The Sprint HTC One Android 4.3 update RUU, 3.04.651.2, is now officially available for download and installation, which is easy.
Just grab the RUU of the 3.04.651.2 version from the HTC’s page here. Click on the Arrow to open up the installation help text, with Download button at the very end.
Follow the instructions there under the title “Manual system update instructions” to install 3.04.651.2 firmware on your Sprint HTC One.
Warning! Don’t try this update on other variants of HTC One, that at Verizon, AT&T, etc. and the international one.
Note: If you have played with modems, custom recovery, custom ROMs, etc. chances are there that this official update won’t work on your phone.
Well, in that case, simply wait for a custom ROM to show up, based on this new firmware/RUU, 3.04.651.2, and flash that using a custom recovery, which is easiest way to update actually.
Let us know what how this update works for you!
Oh btw, not to spoil your fun of Official Android 4.3 update, but, the Android 4.4 KitKat update is already available very unofficially while HTC sits and watch.
It would take HTC another 2-3 months to bring Android 4.4 when it gets itself done with Android 4.3, but you can already grab the KitKat update now using the link below.