- the ability to use 4G mobile internet in parallel with a telephone conversation. For example: talk on the phone and follow the road in navigator;
- instant dialer: fast time to establish a call connection on a 4G network;
- high-quality voice call, voice transmission in HD Voice standard;
- no need to install a special app;
- the service is available for free.
The service is provided as part of the "Zvonki v 4G i Wi-Fi" service. This service is included in the basic set of services for subscribers of all the company's tariff plans where voice calls are available (except for subscribers of prepaid tariffs, "Peredacha dannyh" and "Telemetriya" tariff plans).
The "Zvonki v 4G" service is available only in the 4G network coverage area.
To make a 4G call, the smartphone must have a USIM-card* installed, the subscriber must be in the coverage area of the A1 4G network and enable VoLTE calls on their smartphone.
What you need to do to make a 4G call:
- a smartphone that supports VoLTE calls;
- USIM, i.e. a SIM card that supports the GSM/ UMTS/ LTE standard;
- service "Zvonki v 4G" (see How to manage the service);
- be in the 4G (LTE) network coverage area;
- mobile internet enabled.
*A USIM card is a SIM card that supports not only the GSM and UMTS standards, but also the LTE standard. To check whether your SIM card is suitable for 4G networks, dialing USSD *181#. If it doesn't fit, replace it for free with a USIM card at any A1 Store.
Subscribers of tariff plans (except for prepaid tariffs, "Peredacha dannyh" and "Telemetriya" tariff plans) can enable/disable the service by dialing USSD *141*8#.
You can use the "Zvonki v 4G" service if the service is supported by your smartphone, the model is officially presented in Belarus (produced for the Belarusian market and sold in Belarus), it is in the list of devices that support working on the A1 network.
Currently, the service is supported on the A1 network for the following phone models:
The device manufacturer can change the software settings of the smartphone unilaterally, which may affect its work with the "Zvonki v 4G" service.
A detailed description of smartphones with support for the service "Zvonki v 4G" in the A1 network, which are available for sale, can be found at the link in our online store.
If the 4G network automatically changes to 3G/2G during a VoLTE call, the call will not end, and the sound quality will return to the 3G/2G network level.
The service is available on the territory of the Republic of Belarus in the coverage area of the A1 4G network when using a USIM-card in your smartphone.
In most models that support "Zvonki v 4G", VoLTE is configured by default. If VoLTE is not available automatically, configure VoLTE.
For Android phones: Settings → Wireless Networks → Mobile Network → VoLTE calls.
For Apple phones with 1 SIM support: Settings → Cellular → Data Settings →Voice and Data → enable the VoLTE option.
For Apple phones with 2 SIM support (SIM+eSIM): Settings → Cellular connection → Primary or Secondary (depending on which SIM card A1 is selected for the client) → Voice and Data → enable the VoLTE option.
The service is provided without charge. Calls and SMS are charged according to the subscriber's tariff plan.