---------- Post added at 01:57 PM ---------- Previous post was at 01:26 PM ----------
You can do this from phone recovery mode and OTG connected via USB (pu downloaded firmware into USB drive and connect it to the phone then use correct option from recovery to do the upgrade).
IMPORTANT: If you have obtained the root privilege, you must remove the root and restore the normal version status, and restore the factory settings before upgrading. Otherwise, the upgrade may fail.
If you are upgraded to v. 2.20 you can do the root procedure again (according to Teeemoo manual) using the newest version of Chinese patcher (don't use any other previous versions!).
I uploded it here:
https://mega.nz/#!foIgQYrL!6M05e2wZIpr5Lx2ov4RxW-aAdGFZzVXVoYfUtE3cAc0
Change the file extension from PDF to EXE.
Please be aware the file sometimes is recognized as infected by Win32/Spursint.F!cl (
https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?name=Trojan%3aWin32%2fSpursint.F!cl&threatid=2147717281).
You can use it on your risk, I just disabled antivirus and Windows Defender to use it properly).
Regards.[/QUOTE]
Hi,
unfortunately I have already bricked my phone by using V2.19 root tool on V2.20 ROM.
At the moment I can only boot in EDL mode. I can also connect with Nubia emergency tool but is not updated yet for Nubia x .