What the Yeastar TG Series does

A VoIP 4G gateway acts as an interface between cellular voice services and an IP telephony platform. In a typical deployment, the gateway is connected to the LAN and configured with one or more cellular SIMs. The IP PBX or softswitch sends selected calls to the TG gateway over SIP or IAX2, and the gateway places those calls through the assigned cellular channel. Incoming cellular calls can be routed in the opposite direction to extensions, IVRs, groups or other destinations managed by the PBX. This gives administrators a controlled way to use cellular connectivity as part of a broader business telephone architecture.

Yeastar positions the TG family for cellular trunking, mobile connectivity where fixed lines are limited, and backup-oriented scenarios. The gateway also supports messaging-related functions including SMS sending and receiving, bulk SMS and APIs for SMS and USSD. Those functions can be useful for businesses that need a managed cellular communication endpoint, but the workflow should be designed around the organisation’s policies, carrier terms and application requirements rather than treated as an unrestricted messaging platform.

Verified TG Series technical highlights

Choosing between TG200, TG400, TG800 and TG1600

The simplest way to begin model selection is to estimate the maximum number of cellular channels that need to be active at the same time. A small office that only needs a limited number of mobile routes may fit the TG200, while a busier call flow may justify the TG400 or TG800. Larger deployments with many SIM-based routes can consider the TG1600. However, buying by port count alone can lead to poor results. A business should also identify how outbound calls are distributed, whether particular departments need dedicated SIMs, whether different mobile operators are used, how incoming calls will be handled, whether SMS workflows are required and what happens if one cellular network is unavailable.

Network placement also matters. Voice quality depends on the combined performance of the cellular side and the IP side. The LAN should be stable, the PBX should have a clear trunk configuration, firewall rules should be deliberate, and QoS may be useful where the same network carries heavy data traffic. Cellular antennas should be installed where signal quality is suitable, while the gateway itself should be placed in an environment that meets the vendor’s operating conditions. Before quotation, verify the exact TG hardware version and module options available for the intended country and carrier.

Integration with IP PBX and business networks

A TG gateway is most useful when its routing plan is designed together with the PBX. Administrators should decide which calls should use mobile trunks, how inbound cellular calls are mapped to destinations, whether route selection depends on prefixes, departments or time periods, and how failures should be handled. Yeastar documents interoperability with a broad list of PBX and softswitch environments and also provides integration guidance for its own P-Series platform. Compatibility should still be validated against the specific PBX version and intended features before deployment.

For broader telephony planning, see FourTeck Tanzania’s business IT and IP telephony overview, which explains how voice, switching, firewalls and supporting infrastructure fit together. Buyers comparing handsets, PBX hardware and gateways can also use the FourTeck Tanzania technology shop to frame compatibility, capacity and lifecycle questions before ordering.

Where deployment assistance, network preparation or system changes are needed, the FourTeck Tanzania services page provides context for solution planning, configuration and support. Multi-country customers can also review the regional FourTeck presence through FourTeck Uganda for related East African infrastructure requirements.

Yeastar TG Series VoIP 4G Gateway Tanzania

In Tanzania, a Yeastar TG Series deployment can be relevant to companies that want cellular channels integrated into an existing IP PBX, need an alternative route where conventional fixed telephony is limited, or want selected business calls to use mobile-network trunks under central call-routing control. The most important first step is to define the call pattern. A small office may only need two cellular channels, while a contact centre, branch hub or multi-department operation may need more simultaneous routes. That makes the TG200, TG400, TG800 and TG1600 useful as a capacity ladder, but the final choice should be based on concurrent calls rather than employee count alone.

Tanzania deployments also need careful attention to LTE module and operator compatibility. Yeastar states that supported 4G LTE bands depend on the module type. For that reason, procurement teams should provide the intended mobile operator, SIM type, required voice service, site location and expected traffic before a model is confirmed. A gateway that has enough ports but the wrong cellular module is not a successful design. Signal conditions should also be checked at the installation location, especially when equipment is mounted inside racks, communications rooms or buildings with dense walls and metal structures.

On the IP side, Tanzanian organisations should confirm PBX protocol support, SIP trunk design, IP addressing, firewall policy, VLAN structure and voice QoS. If the TG gateway is intended as a secondary route, administrators should define exactly when calls fail over and how users know which route is active. If SMS or USSD functions are required, the workflow should be documented so access is controlled and business use complies with carrier terms and internal policy. A quotation request is more useful when it includes preferred model capacity, PBX platform, number of SIMs, desired call flows and installation environment rather than simply asking for a generic “4G VoIP gateway.”

Yeastar TG Series VoIP 4G Gateway Dar es Salaam

For Dar es Salaam businesses, the TG Series can fit offices, service organisations, retail operations, hospitality groups, logistics companies and multi-site enterprises that need mobile voice trunks connected to an IP telephony platform. In dense commercial environments, the gateway can be used as one part of a larger communications design that includes IP phones, PoE switching, a PBX, structured cabling and a secured internet connection. The advantage of centralising cellular channels is that calls can be governed by PBX rules instead of relying on separate mobile handsets at individual desks.

Dar es Salaam sites often have more than one operational requirement at the same time: reception teams need predictable inbound handling, sales teams may place a high number of mobile calls, managers want reporting, and IT teams want a system that is easier to administer. A TG gateway can contribute to that architecture by exposing mobile channels as managed trunks. Before deployment, determine whether mobile routes are for primary calling, selective outbound destinations, inbound numbers, overflow, or contingency use. This decision changes the number of ports required and the routing logic configured on the PBX.

The physical installation should not be overlooked. Cellular signal quality can vary across a building, and placing antennas inside a crowded metal rack can reduce performance. The LAN connection should be stable, and voice traffic should not be left to compete unpredictably with large backups, surveillance streams or other heavy applications. For procurement, share the exact building or site context, intended mobile operator, PBX platform, expected concurrent calls and whether SMS integration is needed. This creates a far clearer basis for selecting between TG200, TG400, TG800 and TG1600 than simply matching the model to the number of employees.

Yeastar TG Series VoIP 4G Gateway Mwanza

In Mwanza, organisations evaluating a Yeastar TG Series gateway may be trying to solve a practical branch-communications problem: use mobile connectivity as part of the office phone system without forcing staff to manage separate SIM handsets. A gateway can place cellular channels behind the IP PBX so extensions, IVR menus and routing rules remain centralised. This can be useful for branch offices, distribution businesses, service teams and growing companies that want more structured handling of mobile-originated and mobile-terminated calls.

The first design question is concurrency. Two SIM channels may be adequate for a small branch where mobile trunks are used occasionally, while a business with continuous outbound traffic may need four, eight or more channels. The second question is coverage and operator compatibility. The TG Series supports LTE according to module type, so the selected hardware must be checked against the intended cellular network rather than assuming every unit works identically in every market. Signal checks should be carried out where the antennas will actually operate, not only outside the building.

Mwanza buyers should also decide whether the gateway is expected to be a permanent primary route, a route for specific mobile destinations, or a contingency path if another telephony service becomes unavailable. Each objective leads to different PBX rules and monitoring requirements. When requesting a quote, include the current PBX or softswitch, the number of extensions, approximate busy-hour calling, target operators, number of SIMs, desired SMS or USSD functions and whether the gateway will sit in an existing rack. This enables a model recommendation that considers both capacity and the practical deployment environment.

Yeastar TG Series VoIP 4G Gateway Arusha

Arusha businesses may consider the TG Series where mobile voice needs to be integrated with reception, reservations, customer service, administration or branch communications. Hospitality, tourism, professional services and multi-location organisations often need calls to reach the right team while keeping a consistent business workflow. Instead of assigning standalone mobile phones to departments, a VoIP 4G gateway can make cellular channels part of the PBX so calls are routed to extensions or groups and outbound mobile traffic can follow defined policies.

A useful Arusha deployment plan starts with call scenarios. Identify which users need to make mobile calls, whether incoming cellular numbers are customer-facing, what happens after office hours, and how many simultaneous cellular calls occur during busy periods. That determines the required port count more accurately than total staff. The TG200 offers two ports, TG400 four, TG800 eight and TG1600 sixteen. The appropriate model should also match the available LTE module to the chosen mobile operator, because Yeastar explicitly notes that supported LTE bands depend on module type.

The local network must support voice reliably. IP addressing should be documented, firewall rules should be deliberate, and QoS can help where the same uplink carries large amounts of data. If the gateway is intended for a hotel, lodge or remote property, the equipment room, antenna placement and backup-power strategy deserve as much attention as the gateway configuration. Buyers should provide details about the PBX platform, existing switch infrastructure, available rack space, cellular coverage and intended failover behaviour before procurement. This makes installation more predictable and avoids choosing a gateway based on headline features alone.

Yeastar TG Series VoIP 4G Gateway Dodoma

For organisations in Dodoma, a Yeastar TG gateway can help connect mobile voice services with an IP-based business telephone system in a more controlled way. Government-related offices, professional services, education, NGOs, contractors and private enterprises may have different calling patterns, but the design principle is the same: treat cellular channels as managed trunks, not isolated devices. When the gateway is linked to the PBX, incoming calls can be directed according to extension and group rules, while outbound calls can be assigned to specific cellular routes.

Procurement teams should begin by documenting the reason for cellular trunking. If the objective is cost control for calls to mobile networks, route selection needs to be carefully defined. If the objective is resilience, the PBX must know when and how to use the TG route when another service fails. If SMS is part of the requirement, access to messaging functions and any API integration should be restricted to authorised workflows. The gateway supports tools such as CDRs, logs, routing rules and web-based configuration, which can support administration when properly configured.

Dodoma deployments should also include a physical and network-readiness check. Ensure the selected LTE module matches the operator environment, confirm signal quality at the antenna location, provide clean power and appropriate ventilation, and connect the device to a stable LAN segment. On larger networks, using a voice VLAN and defined QoS policies can reduce competition with data traffic. For a quotation, include intended model capacity, number of SIMs, current PBX, expected concurrent calls, operator preference, rack location and whether installation or integration support is required.

Yeastar TG Series VoIP 4G Gateway UAE

In the UAE, businesses evaluating the TG Series should focus on compatibility, channel count and telecom-policy alignment before purchase. A VoIP 4G gateway is a technical bridge between cellular services and an IP PBX, but its deployment must still fit the operator environment and applicable local requirements. The TG200, TG400, TG800 and TG1600 provide increasing cellular-port capacity, so the right model depends on the number of simultaneous mobile calls, how many SIMs are used and whether different routes are assigned to different business functions.

For multi-branch companies, the TG gateway may be evaluated as part of a broader telephony design that includes SIP trunks, IP phones, centralised call routing, remote extensions and branch connectivity. The network team should confirm whether the gateway will register to a local PBX, connect to a remote PBX over a secured path, or operate as a SIP peer. TLS and SRTP support are listed by Yeastar, but secure deployment still requires correct certificates, credentials, firewall policies and management access control.

UAE buyers should verify the exact LTE module and band compatibility with the intended mobile service before ordering. Messaging, USSD and API features should be used within operator and organisational policies. Equipment placement should provide suitable cellular reception and a stable LAN path. When requesting a quotation, share the model size being considered, PBX platform, number of cellular channels, expected busy-hour traffic and whether the gateway is for primary mobile routing, overflow or contingency use. This creates a stronger technical basis for procurement than comparing only initial hardware price.

Yeastar TG Series VoIP 4G Gateway Uganda

Ugandan businesses can use a TG Series gateway to add cellular trunks to an IP PBX where mobile calling is an important part of day-to-day operations. A company with multiple departments may route mobile traffic through selected SIMs, while a branch network may use a gateway to provide cellular connectivity at locations where the available fixed-line or SIP environment does not meet every requirement. The gateway supports both directions of communication, enabling calls from the PBX to the cellular network and incoming cellular calls back into the VoIP environment.

Model selection should be based on simultaneous calls, not just the number of users. TG200 provides two ports, TG400 four, TG800 eight and TG1600 sixteen. If multiple operators or departments are involved, it can also be useful to map which SIM is intended for which route. Yeastar documents carrier selection, trunk grouping and inbound/outbound routing tools that can support this logic. LTE compatibility must be checked against the exact module type and intended operator before purchase.

Uganda deployments benefit from a clear network design. The PBX and gateway should have stable addressing, the firewall should permit only required traffic, and management access should be restricted. If the gateway connects across a WAN or VPN to another office, latency and path stability need consideration. Antenna placement should be tested for signal quality, and critical installations may require protected power. A quote request should state the PBX vendor and version, channel requirement, target operators, desired call flows, SMS needs and whether branch-to-head-office integration is part of the project.

Yeastar TG Series VoIP 4G Gateway Kampala

Kampala organisations with busy customer-facing teams may need a structured method for using mobile network channels through the company phone system. A Yeastar TG gateway allows cellular SIMs to be presented to an IP PBX as trunks, giving administrators more control over call routing than separate mobile handsets. Sales, support, logistics, reception and field-service teams can have different routing rules while still using the same central telephony environment.

The busiest hour should guide port sizing. If only one or two mobile calls are active at a time, a smaller gateway may be sufficient. If several departments place concurrent calls, four, eight or sixteen ports may be more appropriate. The PBX should be configured with clear outbound patterns so calls reach the intended trunk, and inbound cellular calls should have defined destinations. Call-detail records can support operational review, while balance-related alerts and USSD functions may help administrators manage SIM-based services where supported by the operator.

For Kampala installations, check LTE bands, local signal conditions, antenna location and rack environment before deployment. A gateway placed in a server room can still require antenna positioning that differs from the best place for network equipment. Voice traffic should be protected from avoidable congestion, particularly where surveillance, cloud backup or large file transfers use the same network. Procurement requests should include PBX details, concurrent call estimates, number of SIMs, target mobile operators and whether SMS or API integration is required. That information allows the TG model to be selected around the actual call workflow.

Yeastar TG Series VoIP 4G Gateway Arua

Arua-based organisations may consider cellular-to-VoIP integration where branch connectivity, mobile calling or resilience is more important than maintaining a complex fixed telephony setup. A TG Series gateway can connect cellular channels to an IP PBX so staff continue to use extensions, call groups and standard desk-phone workflows while the gateway handles the mobile-network side. This can simplify operations compared with distributing multiple standalone mobile devices across a branch.

The design should begin with a practical assessment of signal availability and call demand. If the site has only occasional mobile calls, two or four ports may be enough. If the branch acts as a regional communications point, eight or more channels may be justified. Before ordering, the exact LTE module should be validated for the intended operator. The fact that a product family supports 4G does not mean every hardware variant supports every frequency used in every location.

Arua deployments should also consider power continuity and remote administration. A gateway that supports important customer calls should be connected to an appropriate UPS where power interruption is a concern, and management access should be secured rather than exposed broadly. Configuration backup, system logs and packet capture can assist troubleshooting. If the PBX is located at another site, the WAN or VPN path must be stable enough for voice. A strong quotation brief should describe whether the gateway is for local calling, backup, branch integration or messaging, then include operator preferences, PBX details and estimated simultaneous-call requirements.

Yeastar TG Series VoIP 4G Gateway Mbarara

In Mbarara, a TG Series gateway can support businesses that want centralised control of cellular calling across office extensions. Rather than asking users to alternate between an IP phone and a mobile handset, administrators can define when calls should leave through a mobile trunk and how incoming SIM calls should be delivered. This model can fit branch offices, service companies, education, healthcare administration, hospitality and trading businesses where mobile networks form an important part of day-to-day communications.

Capacity planning should take account of peak usage. A two-port TG200 may work for light traffic, but it could become a bottleneck if several users regularly need mobile channels at once. TG400, TG800 and TG1600 expand the available port count. Administrators should also decide whether each SIM has a dedicated purpose or whether calls are distributed across a trunk group. This influences route design, call records and operational troubleshooting.

Before a Mbarara project is approved, verify operator and LTE-band support, inspect signal quality at the intended antenna location, and review the LAN path between the PBX and gateway. If voice traverses a site-to-site connection, the network should provide consistent latency and sufficient bandwidth. Use secure credentials, limit management access and maintain configuration backups. Where SMS, bulk messaging or USSD is required, define who is authorised to use those functions and how messages relate to business processes. Quotation requests should include these operational details so hardware selection and deployment planning happen together.

Yeastar TG Series VoIP 4G Gateway Gulu

Gulu businesses and organisations may use a Yeastar TG gateway when mobile networks are a practical communications route but users still need the structure of an IP PBX. The gateway can bring SIM-based voice channels into the office telephony system so calls can be handled by extensions, groups, queues or other PBX logic. This is especially useful when the business wants consistent call handling across teams rather than maintaining several separate mobile devices.

Sizing begins with the number of simultaneous cellular calls. A small administrative office may fit a TG200 or TG400, while a busier site may need TG800 or TG1600. The model must also have a cellular module that matches the network environment. Because Yeastar states that 4G LTE support varies by module type, frequency and operator checks belong in the pre-purchase stage. Antenna positioning should be tested on site, as indoor construction and equipment-room placement can influence signal quality.

Operational planning is equally important. Define what happens when a SIM has no signal, reaches a service limit or is removed from service. The PBX should have alternative routing rules where required. If the TG gateway is remotely managed, restrict access and use secure network paths. Configuration backups, logs and CDRs should be part of the support routine. For Gulu procurement, provide the PBX model, current network topology, number of SIMs, target operators, desired SMS functions and business purpose of the gateway. This avoids over- or under-sizing the solution.

Yeastar TG Series VoIP 4G Gateway Kenya

Kenyan organisations evaluating the TG Series typically need a clean way to combine cellular channels with an IP-based phone system. The gateway allows mobile routes to be handled through PBX dial plans and inbound call rules instead of separate handsets. This can help centralise administration for offices, customer-service teams, branches and businesses that use several mobile networks for different calling patterns. The TG family scales from two to sixteen cellular ports, giving buyers a practical range of channel counts.

Before purchase, the correct LTE module and operator compatibility should be confirmed. Mobile voice support is not determined by the product name alone; the exact hardware option matters. Administrators should then define whether the gateway is used for primary mobile calling, route optimisation, backup or inbound mobile numbers. These decisions shape the PBX configuration and determine whether additional features such as SMS, USSD, call detail records or API integration are part of the project.

Kenya deployments also need network and power readiness. Keep the gateway on a stable LAN, document the trunk settings, restrict management access and use appropriate firewall policies. If the PBX is hosted elsewhere, assess the WAN or VPN path so call quality does not depend on an unreliable link. Signal testing should be performed at the antenna location. For organisations operating in both Kenya and Tanzania, a standardised PBX and gateway configuration can simplify support across branches, provided each country’s carrier and regulatory conditions are separately verified.

Yeastar TG Series VoIP 4G Gateway Kuwait

Kuwait businesses considering the Yeastar TG Series should evaluate the gateway as a managed cellular-trunk platform rather than simply a multi-SIM appliance. The PBX integration is where much of the operational value appears: users continue to dial from their business extensions, while the administrator decides which destinations use cellular routes, how incoming mobile calls are delivered and whether specific SIMs are reserved for particular departments or call types.

Channel count should be matched to busy-hour use. Two channels may be sufficient for a small office, while a service environment with many simultaneous calls may require four, eight or sixteen. The chosen TG hardware should also be checked for LTE-band compatibility with the intended operator. Yeastar’s documentation makes clear that LTE support depends on module type, so procurement should not rely on a generic assumption that every TG unit supports every local frequency.

A secure Kuwait deployment should include controlled management access, strong credentials, appropriate firewall rules and a documented backup of the configuration. If TLS or SRTP is used on the VoIP side, certificate and PBX settings must be implemented consistently. Antenna placement needs suitable cellular reception, while the gateway itself should remain in a supported operating environment. Buyers should also confirm whether local telecom rules permit the intended architecture. A quotation request is strongest when it states the PBX platform, required channel count, target operator, call-routing purpose and whether SMS/USSD functions are needed.

Yeastar TG Series VoIP 4G Gateway Ghana

In Ghana, the TG Series can be evaluated for offices and branch networks that want to incorporate cellular voice into an IP telephony system. By turning SIM-based channels into managed trunks, the gateway allows staff to use normal extensions while the PBX applies routing rules behind the scenes. This can support customer-facing teams, field-service operations, logistics, multi-site organisations and businesses that use mobile connectivity as an additional communications path.

The correct model depends on traffic rather than company size. A large organisation could need only a few cellular trunks, while a smaller call-intensive operation may require more. Busy-hour concurrency, SIM allocation and route policy should therefore be documented first. The LTE module must also match the intended mobile operator. Where multiple operators are used, administrators can plan separate trunks or groups and decide how the PBX selects between them.

Ghana deployments should include a network review. The gateway and PBX need reliable IP connectivity, and any remote path should have sufficient stability for voice. Use firewall controls, limit web-management access and maintain configuration backups. SMS and USSD tools can be useful for approved business workflows, but they should be governed by access controls and operator terms. Physical placement should balance a suitable equipment environment with the need for good antenna reception. For procurement, provide channel requirements, PBX details, operator preferences, site conditions and the intended role of the gateway so the design can be validated before purchase.

Yeastar TG Series VoIP 4G Gateway Nigeria

Nigeria’s large mobile-communications environment makes cellular trunking an understandable requirement for many businesses, but a successful TG Series deployment still begins with disciplined planning. The gateway should be treated as part of the phone system architecture. Outbound mobile calls can be directed through selected SIM channels, and incoming mobile calls can be passed to PBX destinations. This gives IT teams more central control than a collection of unmanaged mobile phones.

Model sizing should reflect simultaneous calls and routing policy. A TG200 offers two ports, TG400 four, TG800 eight and TG1600 sixteen. Businesses using several operators may assign channels by department, cost plan, destination or resilience strategy. The exact LTE module has to be checked for operator compatibility. Signal quality, SIM provisioning and the network environment can affect real-world performance more than raw port count.

For a Nigerian deployment, the PBX configuration should define normal routing, alternative paths and failure behaviour. Management interfaces should not be exposed unnecessarily, and the device should be included in configuration-backup and monitoring procedures. Where messaging functions are required, bulk SMS and API-based workflows need administrative controls and should comply with operator terms and applicable rules. Power protection can also be important for business-critical calling. A procurement brief should include the exact site, intended operators, PBX platform, number of SIMs, concurrent-call estimate and whether the gateway serves primary traffic, overflow, backup or messaging.

Yeastar TG Series VoIP 4G Gateway Seychelles

In Seychelles, businesses may consider a TG Series gateway when mobile connectivity needs to be integrated with a structured IP phone system. Hospitality, travel, professional services, administration and multi-site organisations can use a cellular gateway to route calls through the PBX while retaining extension-level control. The approach can be useful where staff need mobile-network access without operating individual SIM devices as separate business phones.

Because island and building conditions can vary, signal verification should be part of the design. The gateway’s LTE module must match the operator frequency environment, and antenna placement should be tested where the equipment will actually be installed. Port sizing should reflect the maximum number of simultaneous cellular calls. A TG200 may be enough for limited use, while TG400, TG800 or TG1600 provides additional channels for busier operations.

The IP network should be designed for dependable voice. Keep the PBX and gateway on a stable path, use secure management access, document firewall rules and maintain configuration backups. If the PBX is cloud-hosted or located at another site, verify WAN quality and failover behaviour. SMS or USSD features should be enabled only where they support a defined operational purpose. For a Seychelles quotation, share the PBX platform, expected concurrent calls, number of SIMs, preferred operator, installation environment and whether the gateway is intended for main traffic, special mobile routes or business-continuity use.

Deployment checklist

Frequently asked questions

Quotation checklist for Yeastar TG Series

A complete quotation request should state the required TG model or expected channel count, exact deployment country and city, intended mobile operator or operators, number of SIM cards, existing PBX platform, network location of the gateway, estimated busy-hour calls, whether SMS/USSD functions are needed, and whether the gateway is for primary traffic, selected routes, overflow or contingency use. If the system connects to a remote PBX, include the WAN or VPN arrangement as well.

This information helps separate product selection from assumptions. It also allows the technical team to check whether a smaller gateway is sufficient, whether a larger model is justified, whether network changes are needed and which cellular module should be specified for the intended operator environment.

Decision recap

Choose the Yeastar TG Series when the business requirement is to integrate supported cellular voice channels with an IP telephony platform and manage them through central routing. Start with concurrent call capacity, then verify LTE module compatibility, PBX integration, signal conditions, network readiness and operational requirements such as SMS or USSD. TG200, TG400, TG800 and TG1600 provide a straightforward range from two to sixteen ports, but the right choice depends on how the channels will actually be used.

For Tanzania buyers, the safest procurement approach is to provide the intended operator, location, PBX platform and call workflow before hardware is finalised. That prevents a port-count-only purchase and gives the deployment team enough information to validate the cellular, VoIP and network layers together.

Consult FourTeck Tanzania

FourTeck Tanzania can help structure a Yeastar TG Series request around model capacity, IP PBX integration, LAN readiness, routing design and regional deployment requirements. Use the verified FourTeck Tanzania contact page to share your current phone system, number of SIMs, mobile operator preference and expected concurrent calls.