T2 launches international VoLTE roaming in China, Vietnam, Australia, Singapore

MOSCOW. July 1 (Interfax) - Russian mobile operator T2 has implemented Voice over LTE (VoLTE) calling capabilities for its subscribers in international roaming across China, Vietnam, Australia and Singapore, the company told Interfax.

To achieve this, T2 signed agreements in 2025 with Chinese operators China Mobile (SPB: 941) and China Unicom, as well as Vietnam's Viettel. In late 2024, it partnered with Australia's Telstra and Singapore's Starhub and Singtel. "Technical teams have successfully completed all configuration and testing phases," the company said.

Several years ago, T2 also launched VoLTE roaming in the U.S. with partner operator AT&T, coinciding with the country's phasing-out of 2G and 3G frequencies.

The company clarified that international VoLTE calls are billed as standard roaming calls and do not consume data allowances.

In March, T2 announced the rollout of VoLTE across all Russian regions where it operates.

T2 (T2 Mobile LLC, owned by PJSC Rostelecom) is one of Russia's largest mobile operators, operating since 2003. The company provides services in 70 Russian regions and offers infrastructure for virtual operators through its "MVNO factory". As of 2024, its subscriber base reached 48.9 million customers (including Rostelecom's MVNO ), with over 25 virtual operators utilizing T2's network.