VoWiFI - ability to make calls and send SMS via Wi-Fi

VoLTE is a calling technology with instant dialing and clear sound. The technology provides ability to use 4G mobile Internet in parallel with a telephone conversation and reduces the connection time to 1.5-2 seconds.

ViLTE is a technology for video communication between subscribers on the LTE network without the need to use third-party mobile applications. For a video session, it is enough that both subscribers have a mobile device that supports the technology and are within the coverage area of the 4G network.

* With a normal phone call, it is not possible to use the 4G Internet, since when making a call, the smartphone switches to the GSM or 3G network, due to which the connection time can reach 6-7 seconds. The new VoLTE technology provides an opportunity to reduce the connection time to 1.5-2 seconds.

* Ability to talk on the phone and use the Internet at high speeds.

* Due to the ability to prioritize voice traffic and the much larger capacity of the LTE network, high quality sound is provided when making a call.

* When switching between 2G, 3G and LTE communication standards, battery consumption increases. Due to the fact that VoLTE technology does not require switching between 2G, 3G and LTE communication standards, its use saves battery power.

* When making calls, minutes are consumed within the tariff plan or a package of minutes. Internet traffic is not consumed.

The service is provided free of charge.  

When making calls, minutes are spent within the tariff plan or a package of minutes. Internet traffic is not consumed.

To activate the service, you need a 4G-enabled SIM card and the device supports VoLTE technology.

VoLTE/ViLTE service connection is available through the following self-service channels:

*In the Ucell mobile application (Services -> All services -> Other (select “VoLTE/ViLTE” service) -> Connect)

*Send USSD request *818*1*1#

You can also connect the VoLTE service by contacting the Call Center at 8123.

The subscriber can deactivate the VoLTE/ViLTE  service through the following self-service channels:

* Send USSD request *818*2*1#

* In the Ucell mobile application (Services -> Connected-> Other (selection of the “VoLTE” service) -> Disable)

You can also disable the VoLTE service by contacting the Call Center at 8123

You can check if the service is active in the following self-service channels:

* Send USSD request *818*3#.

* In the Ucell mobile application (Services -> Connected-> Other). If there is no VoLTE service in the list of connected, it means that the service is not connected.

Checking the status of the VoLTE service is also available by contacting the Call Center at 8123.

Today VoLTE/ViLTE  service is available in 4G/LTE through the country.

VoWiFi is currently unavailable in Uztelecom WiFi network.

If the smartphone was connected to the LTE network before the call and during the call and the network icon did not switch to 2G or 3G, then the call is using VoLTE technology.

If, during a call, the caller's smartphone leaves the LTE network, it automatically switches to the 3G network and the call continues without interruption.

If the called subscriber's smartphone does not support VoLTE technology or if the call is made to a landline number, then the call from the caller in the area to the Ucell equipment will be made using VoLTE technology, and in the area from the Ucell equipment to the called subscriber's device – using any available technology.

* If the called subscriber's smartphone does not support VoLTE / ViLTE technology or if the call is made to a landline number, then the call from the calling subscriber in the section to Ucell equipment will be made using VoLTE / ViLTE technology, and in the section from Ucell equipment to the called subscriber's device - using any available technology.

* The VoLTE service is available on all tariff plans except for the "Internet 60" tariff plan, Home Internet tariff plans, and M2M tariff plans.


* The service is available to subscribers who migrated from other operators starting from January 6, 2026.

VoWiFi (Voice over Wi-Fi) is a technology that allows you to make voice calls and send SMS via a Wi-Fi network instead of a traditional mobile network. It provides high-quality communication in places where the mobile signal is weak or absent, such as buildings with thick walls, basements or remote areas.

There is no connection fee.

VoWiFi service is provided automatically when VoLTE service is activated. VoWiFi service will be available by default to all current subscribers with active VoLTE service.

VoLTE service connection is available:

– in the Ucell mobile application

– via USSD request *818*1*1#

– via the Company's Contact Center by calling the short number 8123

– in Ucell's own offices.

Additionally, you need to activate VoWiFi in your phone settings.

When making calls, minutes are used within the tariff plan, package of minutes, or if there are no minutes, payment is made according to the terms of the tariff plan.

Mobile internet traffic is not used.

To use VoWiFi technology, the smartphone must support the VoWiFi function, have a suitable software version, be connected to a Wi-Fi provider network with Internet access, and the VoWiFi function must be activated in the phone settings.

To disable the service, simply turn off the VoWiFi function in your phone settings.

VoWiFi service is available throughout Uzbekistan within the coverage area of the Wi-Fi Internet provider.

* VoWiFi service may be limited in the networks of some Internet providers for technical or administrative reasons. Ucell does not guarantee VoWiFi operation in all WiFi networks.

VoWiFi works within the coverage area of your Wi-Fi router. When you leave the Wi-Fi zone, you will automatically make and receive calls in the LTE mobile network.

* Availability of VoWiFi depends on many factors. Including the software of the mobile device installed by the manufacturer. Please note that some mobile device manufacturers temporarily close access to use VoWiFi at the software level to avoid difficulties in use.

* The VoWiFi service works if the subscriber is currently registered in the Ucell mobile network . In the complete absence of mobile coverage or if the subscriber is not registered in the Ucell mobile network, VoWiFi is temporarily unavailable.

* The service is available to subscribers who migrated from other operators starting from January 6, 2026.

* VoWiFi service may be limited in the networks of some Internet providers for technical or administrative reasons. Ucell does not guarantee VoWiFi operation in all WiFi networks.

* Voice and video calls VoWiFi consume minutes within the tariff plan, package of minutes, or if there are no minutes, payment is made according to the terms of the tariff plan. Voice and video calls VoWiFi do not consume mobile Internet traffic.

When sending an SMS message in VoWiFi, SMS are spent within the tariff plan, SMS package, or if there are no SMS, payment is made according to the terms of the tariff plan.

* When making calls to emergency numbers, the subscriber switches to the mobile network.

* Calls to short numbers in VoWiFi mode are not available. To call short numbers, you need to register in a 2G, 3G or LTE mobile network and try again.