T-Mobile’s been slowly rolling out its VoLTE (voice-over-LTE) service. The network, which routes calls over IP instead of a circuit-switched is already live in cities across the country, but it’s still limited to just a few smartphones including the Galaxy Note 3 and LG’s G Flex. Now it looks like Samsung’s Galaxy S5 is next in line to get VoLTE support, at least according to a T-Mobile support page spotted by TmoNews.

The update will reportedly be available for all T-Mobile Galaxy S5 phones in VoLTE markets starting at 5 p.m. Pacific, bringing the devices up to Android 4.4.2. The software upgrade itself largely focuses on bug fixes, specifically dealing with security and voicemail. It’s unclear whether T-Mobile will include any new features or improvements of its own in the update besides VoLTE.

If you live in a VoLTE market, which includes parts of Atlanta, Austin, Chicago, Dallas, Houston, Long Island, Los Angeles, Minneapolis, New York, Philadelphia, San Francisco, Seattle, Washington D.C. and parts of New Jersey and New England, you should expect the update later today. Everyone else should see the same Galaxy S5 upgrade arrive on June 20, though without VoLTE support.