We get root according to the instructions in the header, install
Total commanderor another file manager, give it root rights. Open the system folder and see if there is a file.
recovery-from-boot.p . if it is, then delete it (this file will always load the factory recovery). We install TWRP from the header using SP_Flash_Tool.
About backup: it was not possible to create files for SP_Flash_Tool using backup via MTKdroid_2.5.3d (I know that the program does not work correctly with 64-bit device processors). It writes a signature error, the boot.img was not found. I dumped the dump by cache and by user Data, it is useless. So make backup via TWRP.
Important information!
Disassembled all the firmware that exists at the moment (06/23/16) and so, the filerecovery-from-boot.p not available only in Aorom v1,2 and CM 12.1 . In the rest of the firmware (off. Android 5.1.1 Android 6.0 and custom) this file IS . I strongly recommend using the instructions above!)
Post has been editedmymy1749 - 23.06.16, 02:50Reason for editing: Added Android 6.0