Originally Posted by nickchk
chill down everyone
safari bro,this guy trying to say he got updated with mod fw,just when reach certain percent,the downloaded file seems corrupted. Now i understand mod fw can't even received the ota file,but how this process is allowed,
and what happened with the ota file he downloaded?
either way,it's pointless,1st the phone fail to update completely(stuck at 25%), 2nd i don't think this problem can be solved.
Thanks for your reply. You are reading my mind.
The issue is really interesting & I think it is worth discussing this.
Safari is right, when he says that FW upgrade OTA for customized ROM is not possible. This is of course true and no one has ever doubted it. This is why when I had the 4.1.2 installed on my G2+ no update was even possible. Droid detects immediately, that the OS has been modified and that you are not running stock ROM.
Okay, so far so good.
Now I have pre-rooted 4.2.2 installed on my phone. When I hit the "Check for update button" it detects that my OS is genuine (although it is not), downloads the whole update package (see screenshot), restarts the phone (part of the update process) and starts installing the update. When the installation reaches 25%, an error message appears saying, that an error has occurred. The phone restarts and loads the "old" OS.
I have tested this a several times and it always hangs on 25%.
The question is NOT why I CAN'T install OTA updates on modified ROM. The question is why I CAN download and install OTA updates on modified ROM.
My suggestion is that:
ROM 1 (4.1.2) had a modified kernel. That's why the OTA updates were not possible.
ROM 2 (4.2.2) is pre-rooted. And I assume it is just stock FW (kernel not modified) with few modifications in the user permissions. This would explain the OTA update and why it reaches download mode and hangs on 25% of the installation.
I hope this brings more clarification to the situation and this would be useful to all members of the forum.