[One (M8) Q&A, Help & Troubleshooting] FillNill:
Thanks for all your help! My phone is fix now. :D

Hello (hopefully) friendly xda users,

I will try and be as detailed in the post as I can to make both your lives and mine as painless as possible! :)

So, last week I bought a brand new HTC M8s from the shop. I live in the UK, however I bought the phone in Germany because it was cheaper over there. The phone is unlocked (I didn't buy it on contract, I bought it outright). The phone is on EE, here in the UK (not sure if you need to know that but I'm being detailed).

My previous phone was an IPhone 4 (I know... sorry!) which I’ve had for over 5 years, I bought it at launch back then and haven’t had a new phone since. I'm no longer an Apple user, and have gladly come to the realisation that Apple isn't all that; I feel I can say that here and not get in trouble. :p I've had my eye on the HTC M8 for a while and finely to the plunge; and just bought it.

I had read that you could put a sort of stock google android (Google Play Edition) on the HTC M8, and that is what I had decided on doing. Straight out of the box. I know, all this is throwing up red flags all over the place; new to android, previous apple user, etc. but I ignored those and said to myself "I've jailbroken before, how hard can this rooting business really be". (Boy was I wrong!)

To cut an even longer story short, it all went tits up!

Sorry for all this preamble but I felt it was needed to help give some backroad info on the situation and help you better help me.

So this is how far I got:

I unlocked my bootloader.

My phone is not S-off. (No matter what guide I tried I couldn't get it S-off, I don't know; this could have been the problem.)

This is the sad part of the story:

The next step in the guide was to flash the recovery with a custom one. In the case TWRP.

I copied it all over and then hit recovery. Nothing. My phone just shuts down. "Crap! That's it I killed it." I think.

Anyway, I hard reset my phone and it starts up normally into android. Nothing seems to be wrong. (Feww! That was lucky!)

I try the same process again, same thing. It just turns off; no TWRP, no stock android, nothing.

At this point many hours have past and I'm giving up.

My phone is still working, it's not bricked; I think to myself it could have all gone a lot worse. I just decide to use the google now launcher off the play store and let that be the end of it. (It basically does what I want.)

However, the next day my phone tells me it needs to update. I think nothing of it, click download and install. My phone attempts to install the update then restart. Except now when it tries to restart it dose the exact same thing it did when I tried to install TWRP. It just turns off. I restart my phone, it boots into the android; nothing went wrong. I check and sure enough it didn't install the update. Odd I think, I try to update again (this time leaving it for at least 20 mins); same thing again. Just shuts down, no update.

Ok, I then think a factory reset might fix the problem. Both clicking factory reset from within android or the bootloader dose nothing the phone just shuts down.

To sum up the real problem.

I cannot install updates.

And I cannot factory reset my phone.

Here's what with (my limited knowledge and research), I think is wrong. I don't have a recovery...? So I need to reinstall a stock recovery or stock HTC version of the android OS?

I've read you need to use a RUU?

But instead of trying to tackle the situation on my own (like an idiot (like last time)), I'd do it properly this time and ask the XDA forums for help.

Again, I really know nothing about android; at all! So what I've said about recoveries and RUUs could be total crap for all I know! That said I'm not a total noob at computers and am not scared of using CMD prompt or things of that advanced nature. Really I just need someone to guide me through (in the most basic steps (from the beginning)) as to how to fix my phone. Talk to me as if I was a child and not an adult who should have known better!

Thank you in advanced for being to patient, and helping me fix this problem.

Cheers, FillNill

.P.s Just to be clear, I no longer want to turn my HTC m8 into the Google Play Edition, I just want to reset it back to the Sense version of android. So I can install updates and all that.