The Pie party has begun already in the USA and in that matter, T-Mobile Galaxy S9 and S9 Plus are now receiving the upgrade to Android Pie. It is seeding officially with build number G960USQS3CSAB and G965USQU3CSAB for the S9 and S9+ respectively. It teams up with the January 2019 security patch update to fortify the device from latest security vulnerabilities. As of this writing, the system software update should be rolling over the air to the users across the specified region with T-Mobile carriers. Obviously, OTAs follow a phased rollout, so everyone may not get to see the update immediately. In that case, you can upgrade manually using the ODIN flash tool. We have covered both the methods below.
After installing the system update to Android 9.0 Pie, new features like gesture navigations, adaptive battery, improved notification management, App slices, Recent Apps etc will grace the device. There are many design changes in the interface as well. Also, with this update, Samsung introduces the One UI interface which is step up from the previous Samsung UX.
How To Find Software Update on T-Mobile Galaxy S9 and S9 Plus
The latest Pie update for T-Mobile Galaxy S9 and S9 Plus from Samsung is rolling over-the-air. It will roll in automatically into the devices. Then you will get the notification to download and install the same.