Please tell us some basic information before asking for help:
Model Name:zb601kl
Firmware Version:.082
Rooted or not:not rooted
Frequency of Occurrence: always
APP Name & APP Version (If your issue relates to the app): downgrade to .63
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.
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How to downgrade to .063 from .082