Flashing Stock Firmware:
1) Download firmware for XT1643 from
https://drive.google.com/file/d/0B1N6dGU7FEXsSjR3QUtsRU1RTVk/view
2) Download mfastboot from
https://drive.google.com/file/d/0B5j...ew?usp=sharing
3) Extract the firmware into the folder containing mfastboot.
4) Reboot the phone into Bootloader (power off, then press the power and volume down buttons simultaneously).
5) Execute these commands and make sure you receive an 'OKAY' after each command.
Code:
mfastboot oem fb_mode_set
mfastboot flash partition gpt.bin
mfastboot flash bootloader bootloader.img
mfastboot flash logo logo.bin
mfastboot flash boot boot.img
mfastboot flash recovery recovery.img
mfastboot flash dsp adspso.bin
mfastboot flash oem oem.img
mfastboot flash system system.img_sparsechunk.0
mfastboot flash system system.img_sparsechunk.1
mfastboot flash system system.img_sparsechunk.2
mfastboot flash system system.img_sparsechunk.3
mfastboot flash system system.img_sparsechunk.4
mfastboot flash system system.img_sparsechunk.5
mfastboot flash system system.img_sparsechunk.6
mfastboot flash system system.img_sparsechunk.7
mfastboot flash modem NON-HLOS.bin
mfastboot erase modemst1
mfastboot erase modemst2
mfastboot flash fsg fsg.mbn
mfastboot erase cache
mfastboot erase userdata
mfastboot erase customize
mfastboot erase clogo
mfastboot oem fb_mode_clear
mfastboot reboot
Hope Its Helpfull For You....




