Before We proceed, Kindly Note That Your Are Doing This At Your Own Risk and must have Full System Firmware Backup

Also its likely you will loss all data on your internal SD.
—Be Cautioned!!

Follow by using the bellow steps 

Download ADB_and_Fastboot_interface” and extract to folder

::::in cmd::::

—>to open cmd :: 

  Open your ADB_and_Fastboot_interface” folder by holding shift and right clicking mouse.

>>NOTE : do not type “$:”

>> “$:” indicates the code to input

  Type:

 $: adb devices

              -{ hit Enter key}

 [ in the command prompt and it should list your device. ]

$: adb reboot bootloader  

              -{ hit Enter key}

[ Device will reboot to bootloader/fastboot ]

$: fastboot devices    

              -{ hit Enter key } > ( wait for device to get detected )

[ this will help you to know whether your device is connected to PC-

in the command prompt and it should list your device. ]

now type; 

$: fastboot oem unlock     

              -{ hit Enter Key }

[ here look on on your handset and follow the  instructions both on your device screen and cmd terminal ]

$: fastboot format userdata 

               -{ hit Enter Key }

[ Please note that, your internal storage will be wiped so all your files will me cleared. Sorry but its HIGHLY RECOMMENDED ]

$: fastboot reboot 

              -{ hit Enter Key }

Your TECNO W4 Device/Android Devices will then ask if you want to unlock.  Using the volume keys, highlight “Yes” and then press the power button to select it. Your bootloader will now be unlocked.  Choose to start your tablet and it will factory reset itself and reboot. You are now operating with an unlocked Device.
you are done!!

Or::

—only when u are already in bootloader or fastboot

Download ADB_and_Fastboot_interface” and extract to folder

  Open your ADB_and_Fastboot_interface” folder by holding shift and right clicking mouse.

Type:

$: fastboot devices     

         -{ hit Enter key } 

[ this will help you to know whether your device is connected to PC-in the command prompt and it should list your device. ]

$: fastboot oem unlock   

              -{ hit Enter key }

 [ here look on on your handset and follow the  instructions both on your device screen and cmd terminal ]

         

$: fastboot format userdata 

               -{ hit Enter Key }

[ Please note that, your internal storage will be wiped so all your files will me cleared. Sorry but its HIGHLY RECOMMENDED ]

$: fastboot reboot 

              -{ hit Enter Key }

Your TECNO W4 Device/Android Devices will then ask if you want to unlock.  Using the volume keys, highlight “Yes” and then press the power button to select it. Your bootloader will now be unlocked.  Choose to start your tablet and it will factory reset itself and reboot. You are now operating with an unlocked Device.
you are done!!

NOTE::

HIT ENTER KEY AFTER EVERY GIVEN COMMAND

you are done!!

Credit:

XDA-Developer

Nana Iyke Quame

Zackie Ai [ zac6ix ]

Emmanuel Akor [ emmy 1′ ]

DroidPeepz Inc

AMD

8 COMMENTS

  1. Hello Mr Akor!
    I follow all steps and all done! but one problem i still wont be able to flash the recovery via SP Flash tool i get the error “PMT CHANGED OF THE ROM, IT MUST BE DOWNLOADED”

  2. I try to flash TWRP using the SP Flash Tool I get the error “PMT changed for the ROM; it must be downloaded.” Searching that on Google shows me the solution is to unlock bootloader i do follows all steps as mentioned in this forum with no hope.
    I would like to just flash the TWRP recovery to run the SU.zip but haven’t sucessfully been able to flash. Any help on how to proceed would be most appreciated.

    My build number is W4-AW875A2-M-160910V6
    Kernel Version 3.18.19+

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