RUU represents an easy way to update your HTC device, and luckily, HTC shared some important firmwares as RUU today. First up, there is a T-Mobile HTC One M9 Android 5.1 update, software version 2.7.531.6 available as RUU, and then the Sprint HTC One Max, software version 3.02.651.8, which is still Android 4.4 KitKat.
You also have the RUU file available for newly launched HTC Desire 626S on T-Mobile, software version being 1.06.531.7. And last but not the least, if you own a AT&T HTC One M9, here’s a Android 5.1 update, software version 2.6.502.16 also available as RUU. Grab the downloads below.