How to downgrade device zc550kl,without help of laptop or PC ,?
Please tell us some basic information before asking for help:
- Model Name:ZC550KL,Z010D
- Firmware Version:18.104.22.168
- Rooted or not: not
- Frequency of Occurrence:-
- APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.