Flash guide ZUK Z2 Pro (Z2121)internal SD-Card:
Beginning
1.0 Download Firmware/ROM (Download latest!)
1.0.1 Extract the .7z file with ROM/Firmware you downloaded at 1.0
1.0.2 Connect the phone via USB-C cable to your computer and create a folder called "sdfuse" at the root of your internal storage.
1.0.3 Copy all the exctracted .qsp files into the sdfuse folder.
1.0.4 Shutdown the phone.
1.0.5 Hold down the volume- button and power on the phone. At second vibration release the power button, but still hold the volume- button. Now the developer recovery menue should be shown.
1.0.6 Select "Sd update" and confirm with power button.
1.0.7 Hit "apply" or "OK" with tapping on it. Now the flashing procedure will start immediatly. After this was successful hit the reboot button and you're done.
*¹ You flashed a Custom ROM via TWRP means Custom Firmware / Custom ROM. Furthermore if your merchant flashed a ROM with multilanguage support (more than English and Chinese) and it's unable to gain OTA update (non rooted - if you don't know what this is you are not rooted!) your device running on a Custom Firmware!
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FAQ:
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This tutorial is for all editions of ZUK Z2 Pro (Z2121).
USB flashing will wipe your internal phone storage!
SD-Card flashing won't be wiping anything, but exeptions confirm the rule!
Flash at your own risk, and alway follow the flashing tutorial.
Please note this tutorial is different than ZUK Z2 (non Pro) flashing tutorial!
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---This method only works, if your phone is able to boot---
Note:
##############A T T E N T I O N##############
DO NOT TRY TO FLASH VIA THIS METHOD, IF YOUR PHONE HAS A CUSTOM FIRMWARE *¹ !
If you try this nevertheless you phone will be bricked!
#########################################
Information
If your phone has a official ROM/Firmware installed but it is rooted etc. it will work without bricks.
This tutorial is for all editions of ZUK Z2 Pro (Z2121).
USB flashing will wipe your internal phone storage!
SD-Card flashing won't be wiping anything, but exeptions confirm the rule!
Flash at your own risk, and alway follow the flashing tutorial.
Please note this tutorial is different than ZUK Z2 (non Pro) flashing tutorial!
###################
---This method only works, if your phone is able to boot---
Note:
Code:
Usually no data will be wiped. But to be save do a backup first.
##############A T T E N T I O N##############
DO NOT TRY TO FLASH VIA THIS METHOD, IF YOUR PHONE HAS A CUSTOM FIRMWARE *¹ !
If you try this nevertheless you phone will be bricked!
#########################################
Information
If your phone has a official ROM/Firmware installed but it is rooted etc. it will work without bricks.
Beginning
1.0 Download Firmware/ROM (Download latest!)
Code:
###REQUIRED###
https://www.androidfilehost.com/?w=files&flid=94052
1.0.1 Extract the .7z file with ROM/Firmware you downloaded at 1.0

1.0.2 Connect the phone via USB-C cable to your computer and create a folder called "sdfuse" at the root of your internal storage.
1.0.3 Copy all the exctracted .qsp files into the sdfuse folder.
1.0.4 Shutdown the phone.
1.0.5 Hold down the volume- button and power on the phone. At second vibration release the power button, but still hold the volume- button. Now the developer recovery menue should be shown.
1.0.6 Select "Sd update" and confirm with power button.
1.0.7 Hit "apply" or "OK" with tapping on it. Now the flashing procedure will start immediatly. After this was successful hit the reboot button and you're done.


*¹ You flashed a Custom ROM via TWRP means Custom Firmware / Custom ROM. Furthermore if your merchant flashed a ROM with multilanguage support (more than English and Chinese) and it's unable to gain OTA update (non rooted - if you don't know what this is you are not rooted!) your device running on a Custom Firmware!
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FAQ:
I switched the FAQ section to post #5
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