You can try this. It works on Sidekick 3's
1. at the same time hold the menu button (top left) and the jump button (bottom left)
2. This will bring you to the emergency screen (it gives you the option to make an emergency call)
3. Open to the keypad and hold in the menu+shift+q buttons at the same time.
4. The phone will reset and clear/unlock the security code
If that doesn't work you can trya Master Reset
1. Remove the battery and the SIM card from the device.
2. Flip the sidekick open; press and hold the letter 'r' on the keypad.
3. While holding the letter 'r', place the battery back in the device. DO NOT INSERT THE SIM CARD YET.
4. The sidekick will restart itself twice. Please make sure not to let the letter 'r' go until it has fully rebooted.
5. Once it has fully rebooted, remove the battery, re-insert the SIM card and battery and power up the device.
6. Once the device has fully rebooted, all prior information should be erased from the device and it should be restored back to the default factoy settings.
Thanks to
Sidekickskins.net
same problem
this is just like mine because its a brand new phone and the sim card keeps deleting then bring the memory back
sim card wont work
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