Hey,
So as mentioned in the large "How to root" thread, any update after 4.4.3 will essentially make your device unrootable (or unwritable).
I have the xt1058, which is one of the devices with a locked bootloader. This device is also compatible with Android 5.0, so I was wondering if I flash a captured OTA of 5.0 for the xt1058, will that lock out my bootloader and ensure that I can never root again?
Thanks!
Not sure what you mean by "flash a captured OTA" but with a locked bootloader all you can flash is a ROM or OTA which is digitally signed by Moto and meant for your phone and its CID value. In other words, you can't capture an OTA zip file, modify, repack it and flash it to include Root, if you have a locked bootloader.
If you want usable root on the X you need two parts 1. Root Exploit, and 2. An Exploit that allows for disabling Write Protection.
If you have a locked bootloader you need someone to find these exploits and create a repeatable process to use them to gain root and disabling write protection. You basically need to find and exploit a flaw or vulnerability in the phone, or its software. i.e. Hack It.
When Write Protection is enabled (the phone's default state with locked bootloader, or the state you are in after you install 4.4.2), any changes made to /system, or the like, (including, but not limited to, App installs, file modifications, deletions, renames, etc) are not permanent and are lost at power off/on.
On a locked bootloader you are relying on someone finding vulnerabilities in the phone or its software to both root and disable write protection. Period. No way around that.
As it stands right now, no one has released info on any vulnerabilities which could gain root on a locked bootloader 2013 X which have been upgraded to 4.4.4. So there is no process for rooting those locked bootloader phones.
While JCASE's Sunshine tool can exploit a vulnerability to unlock the bootloader (disabling write protection), it needs to be able to ROOT, or Temp Root, the phone first, which leaves out phones on 4.4.4 (unless I've missed a change recently). (and before you ask, no, you can NOT safely downgrade from 4.4.4 to 4.4.2 or lower, nor can you get to a state where Sunshine will work once you have 4.4.4 on your phone.)
With further security enhancements as android evolves, its only going to get more difficult finding vulnerabilities to exploit and creating repeatable processes for those with locked bootloaders. In other words while there might be a chance someone comes up with something for locked bootloader 2013 X's on Lollipop, I wouldn't count on it happening, nor would I "bet the farm" that it will ever happen.
