[One (M8) Q&A, Help & Troubleshooting] BerndM14:
1) I believe that's the most recent FW update for T-Mobile Poland.

2) I don't have a real answer as to why you still don't have extreme power saving mode, perhaps it's the carriers choice for whatever reason.

3) Devices that gets updates more quickly: 1) Google Play Edition device. 2) HTC WWE (International) & HTC WWE (Asia) . 3) Developer Edition. 4) The rest of the world with carrier branded phones at of course the leisure of the carriers. They first have to mess it up with bloatware then spend weeks trying to fix the mess before sending the OTA to mess up your device.

4) Yes, tampering with the device in any way voids warranty. Though it is my understanding that some countries in the EU overlook these sorts of things to some degree. However, given then the fact that you are S-OFF you can return your device to 100% stock which should be good for warranty issues. The only thing that "might" give it away is, if you prefer to stay S-OFF though the carrier has to prove that you did something wrong as apparently some HTC devices do leave the factories in an S-OFF condition already.

You could attempt to go back to S-ON though some here don't recommend it as it could throw out a security flag that'll completely give your tampering away or even worst, it could get bricked. I think the thread that discussed it was in the Verizon forums, you could perhaps check it out there, the thread starter was Scotty, the same guy that gives the guide to removing the tampered banner on the phone. [how to] remove your "tampered" banner

5) Yes you can root the phone and still receive OTA updates, however if you do the OTA update you'll lose root. It's easy enough to re-root again though. Of course if you flash a custom recovery you need to flash back the stock recovery again. Your device needs to be in original state to receive OTA in other words... Any deleted apps(Like Facebook) needs to be put back, stock recovery, stock ROM, stock Kernel.

You can however boot the custom recovery and still root, that way you keep your stock recovery intact. If you do want to flash a custom recovery, MAKE A BACKUP of your stock recovery first. There are currently none available for your device that I can find so it's imperative, else later on when you decide to go back to stock you'll sit without a recovery.

You can boot Philz and make a complete nandroid backup selecting everything including recovery OR you can make a backup of recovery as follows:

You must be rooted, can get root with Towel Root. You must have adb installed, open command prompt in adb folder, connect phone to device and type:

adb shell cat /proc/emmc

This will display the partition lay out of your device and search for recovery, for me it's in block 43(I think it should be for you as well) then type:

su - [I][B]grant the phone root privilege when the pop up comes up on phone[/B][/I]

dd if=/dev/block/mmcblk0p43 of=/sdcard/recovery.img

What that does is convert and make a copy of the recovery partition mmcblk043 (The "if" or input filepath) onto the "of" (output filepath) /sdcard as "recovery.img". That's it, that's your backup of stock recovery.

When you need to go back to stock you can just flash it via fastboot with:

fastboot flash recovery recovery.img

I would suggest the dd method for a stock recovery as only Philz makes a backup of recovery, TWRP does NOT make a backup, which is a bit of a problem. Of course when you made the backup, the file isn't that big so maybe you could upload it and share it in the Collection thread along with your nandroid backup, it could come in handy to help many other people that don't do it. :good: