Hard Reset LG T310i Cookie WiFi
- Check device it must be working.

- Now open up dialer by pressing Call key.
- Type in this code: 1809#*310#
- Then confirm whole process by pressing Call key again.

- Device should reboot, after that process will be done.
Hard Reset LG T310 Cookie Style
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WARNING !
Hard Reset will erase all of your data
All described operations you are doing at your own risk.
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