Please tell us some basic information before asking for help:
Model Name:xootd
Firmware Version:.429
Rooted or not:no
Frequency of Occurrence:just now
APP Name & APP Version (If your issue relates to the app):update to.429
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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I just updated to .429 from .424.using the link given in the forum.downloaded 1.69gb and moved into the internal storage. restarted the phone.updation successful.it has not wiped any data, no problem with unlock pin.