Saturday, May 28, 2016

HTC One M9 AT&T US. Wishing advice on getting back to stock enough to receive OTA

Greetings! I've been unlocked / rooted for a while using HTDEV / TWRP / SuperSU with S-ON and would like to revert back to stock just enough to start receiving OTA again... and eventually Marshmallow. Sadly, I'm getting older and would rather limp along the stock road as I don't find myself tweaking as much anymore. Some facts:

HTC One M9 AT&T US
Android 5.1
HTC Sense 7.0
2.11.502.18
*** Software status: Modified ***
***RELOCKED***
***S-ON***

I unlocked bootloader via htcdev and made sure to make a backup of my stock rom before doing anything so I have that.

What I've done so far:
-TWRP restore my stock ROM (message popped up upon completion stating that device is not rooted, do you wish to root and I chose NO)

-Found (what I think to be) correct replacement stock recovery and flashed via fastboot. It was 2.6.502.16 (Android 5.1) AT&T US stock recovery download from andromods

-"Relocked" bootloader.

Is this all I need to do? I see some walkthrough that involve using Sunshine for S-OFF along with MID/CID and RUU back to 100% stock, but do I need to do all that with all I've saved during my original unlock/root process?
I saw right away that there was an 80ish mb update already so I decided to try and install the update but it stalled out about 10% with the red "!" phone graphic.

I follow you guys quite a bit over here at xda and really dig this community. Any help would be much appreciated!


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