Don't get too excited if you see an update notification on your T-Mobile HTC One or Galaxy Note II today – they're both getting minor updates. Both devices stay on Android 4.1.2, but cheer up. There are phones that don't get any update love.
The HTC One update has version number 1.27.531.8, and is coming via OTA. You may notice this isn't even the 1.29 HTC software revision containing fixes for the camera and sluggish buttons.