Скачать или смотреть How To Downgrade Android Firmware From Newer Version In A Mobile? | Android 7 to Android 5.1.1 | CSB

How to install an older version of android from a newer version of android on a device. In this video I used my own mobile to demonstrate how to do it, I have Motorola X play mobile which is pretty old. But it got upgraded to android Nougat once when an update came for it. But the problem is the phone became bloated in terms of storage and also it's speed and efficiency in terms of battery went down. So I realized the problem and I decided to reinstall android 5.1 (Lolipop), which is the android kernel the phone came packed with...
I hope you got an idea about how to root a mobile (basic) to how to flash and reinstall android OS in it (Advanced).
This video contains 2 parts:
00:00 - Intro
00:47 - How to unlock the bootloader - PART 1
09:07 - How to Install the firmware -PART 2

adb_fastboot : https://androidfilehost.com/?fid=7454...
motorola usb driver: https://motorola-global-portal.custhe...
motorola webpage (where you have to sign up and unlock your mobile): https://motorola-global-portal.custhe...

For Unlocking the Bootloader (mobile's BIOS kinda..):

fastboot devices
fastboot oem get_unlock_data
fastboot oem unlock KEY
Reboot

For the installation use these codes(one by one):

.\fastboot oem fb_mode_set
.\fastboot flash partition gpt.bin
.\fastboot flash motoboot motoboot.img
.\fastboot flash logo logo.bin
.\fastboot flash boot boot.img
.\fastboot flash recovery recovery.img
.\fastboot.exe flash system system.img_sparsechunk.0
.\fastboot.exe flash system system.img_sparsechunk.1
.\fastboot.exe flash system system.img_sparsechunk.2
.\fastboot.exe flash system system.img_sparsechunk.3
.\fastboot.exe flash system system.img_sparsechunk.4
.\fastboot.exe flash system system.img_sparsechunk.5
.\fastboot.exe flash system system.img_sparsechunk.6
.\fastboot.exe flash system system.img_sparsechunk.7
.\fastboot flash modem NON-HLOS.bin
.\fastboot erase modemst1
.\fastboot erase modemst2
.\fastboot flash fsg fsg.mbn
.\fastboot erase cache
.\fastboot erase userdata
.\fastboot reboot

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