[Q] Help moding infocus m512 snapdragon msm8926
I'm trying to understand how to be able to mod a recently bought chinese phone "infocus m512", it's based on qualcomm snapdragon msm8926 and has android 4.4.2 installed which comes with "su" already installed, so basically the phone is already rooted.
I've found out the following:
/system is read only and cannot be remounted with r/w using the "su" available.
powering with both volume buttons pressed boots into some mode where the system is r/w but any changes made are not kept. I think it is FTM mode, the device is then recognized by ADB but not by FASTBOOT.
powering with vol down button pressed boots into download mode and the device is not recognized by ADB or FASTBOOT.
Any help understanding how to:
1. modify the /system partition
2. what can be done in FTM mode, and why changes to system do not stick
3. how to possibly use download mode to flash modified imgs?
4. find out if any write protection is enabled on the device