T-Mobile releases the Android Pie update for the Galaxy S9 and Galaxy S9 Plus North American carrier T-Mobile has released the Android Pie update for the Galaxy S9 and Galaxy S9 Plus. T-Mobile is the last of the four major carriers to be pushing out Pie to Samsung’s 2018 flagships. The update was released on February 10 and comes with software version G960USQS3CSAB and G965USQU3CSAB for the S9 and S9 Plus respectively. The Pie update for T-Mobile’s Galaxy S9 and S9 Plus brings RCS Universal Profile 1.0 support
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Preference:
– https://www.sammobile.com/2019/02/11/t-mobile-galaxy-s9-android-pie-update-rolling-out/

Source: https://www.youtube.com/watch?v=N2-tqEyBM7E