1. On the phone, make a backup of all data (since during the upgrade all data will be erased). This is an obligatory condition.
2. Unlock your bootloader: (There´s no way around it (unfortnuately), but after the procedure your device will be locked again, so don´t worry!). The device will make a factory reset, so once again, BACKUP your files!!!!!!!!!!
3. Enable ‘USB debugging’ and ‘OEM Unlock’ option from setting>developer option>. To enable Developer Options, go to About phone and tap the Build Number 7 times.
4. You must download three zip-archives with a full "Full OTA" firmware on which you want to flash (If you look through in the FF (FirmwareFinder), you see there are 4 archives for China and 3 for other locations. You must to download for the version what model and location you will have after the firmware);
5. Add the downloaded files to the folder "HWOTA\Update" and run the .cmd file, it will rename them automatically according to the template:
- update_data_full_public.zip to update_data_public.zip
- update_full_....zip to update_all_hw.zip
- update.zip don't rename
6. After run the universal batch file update.bat in the "HWOTA" folder, which will provide an opportunity to choose the required work option (change firmware/rebranding (change location)). FOLLOWING INSTRUCTIONS ON THE SCREEN OF THE MONITOR - the entire process is accompanied by prompts.
At the end of the process, everything should work fine... Be prepared, the bootloader will be locked after changing the location or firmware as a FullOTA.
7. If suddenly it turned out "bootloop" - go into the stock Recovery and make wipe.
PS: To change the firmware using the SD card, you need to create a folder "HWOTA" on the SD card and copy three firmware archives with the changed names (see above). In the batch file select item 1 "SDCard HWOTA directory"
Short video tutorial for upgrade of any version authorized or unauthorized in phone P10 Lite Thanks @Alexxxx1
HwOTA8 method for rollback from EMUI 8 to Emui 5 - Huawei P10 lite Thanks @Alexxxx1
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PPS: Sorry for my English!!!