S21 series-AUGUST 2025 update

[ironass]

Samsung have begun rolling out the August 2025 security update for the S21 series on Android 15/One UI 7.

 

[Roadijeff]

I guess this hasn't made it to the T-Mobile users yet. My S21 Ultra still says that its June 1 security update is the most current.

 

[ironass]

I guess this hasn't made it to the T-Mobile users yet. My S21 Ultra still says that its June 1 security update is the most current.

You're right.

I just checked and both U.S. models, G998U & G998U1, are all still on the June 2025 patch with all carriers.

The previous update for the global S21's was the 8th May update to Android 15 and One UI 7.0 with the April patch. This may be because the S21 series is now on quarterly security updates.

 

[gray2018]

So is the last update for the S21 Ultra in Feb 2026?

 

[ironass]

So is the last update for the S21 Ultra in Feb 2026?

Sounds about right.