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Help Bootloop S-On no USB-Debugging

L

laurin22

Lurker
i got a big problem!
i had root on my M8s and tried to fully unroot.
for that i used the function of the app SuperSU and fully unrooted my phone. perhaps my phone got stuck while booting and im in a bootloop. i can actually go to the fastboot but for using RUU i nead S-OFF which i dont have.. i also dont have USB-Debugging on anymore..
is there any possible way of comming out of an bootloop with s-on and without usb debugging? please help.
thanks!
 
You don't need S-Off to run an RUU unless you want to downgrade the firmware or use one with a different cidnum from your phone. If you can find an RUU for your cidnum and at least as up to date as your firmware you can use that as you are.

You can use USB debugging from recovery if you have a custom recovery (and if your bootloader is unlocked you can flash a custom recovery from fastboot). However I'm not sure how it will help you.

Of course if the problem is rom corruption you can fix that by flashing a custom ROM (again from custom recovery). But then you will be rooted again. Of course you may be able to find a stock ROM that's flash able from recovery (or a nandroid image of one).

There are probably fewer of these resources available for the M8s than for the actual M8, but if you can find any of these things they will let you get the phone working again.
 
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well my phone is still unlocked, thats what it says in the fastboot menu. also when i try to flash the RUU it always says "parsing device halted due to large image update fail"
what can i do to fix the problem and get the RUU working? it should be the correct one !
 
well okay, i relocked my bootloader, still if i try to run the RUU it still says
"parsing device halted due to large image update fail"
what to do?
 
Did you check the md5sum of the RUU to make sure it downloaded correctly?

If so, are you certain it's the right RUU for your model, firmware version and cidnum?
 
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