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Downgrade to .063 from .082

Star II
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.
How to downgrade to .063 from .082

Zen Master III
Hi there, you may click on the following link to download update manually, request you to read the instructions before upgrading/downgrading and take a full backup of the device before. Click here:
Hi, kindly click on the following link and follow the instructions to update manually. Click here: