So you want to do a Master Reset? What does the master reset do?

A master reset will reset your sidekick back to the default settings. Anything you had saved in the phones memory will be deleted. This includes ringtones, games, etc.... It also can supposedly clear the privacy lock.

 

What it will not do is remove the login information and screen name. You need to call T-mobile customer care. From your T-Mobile phone, dial 611 free of charge. You can also call them toll-free at 1-800-937-8997 from any phone.

 

 

The following procedure below can performed to master reset the Sidekick 3, the Sidekick LX, the Sidekick ID, and supposedly on the Sidekick Slide (haven't done it myself so I can not verify that).

 

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 factory settings.

 

 

For the Sidekick II master reset, all I have been able to find is the procedure below.

 

Press the power button and reset button at the same time. Unit will vibrate when reset. You can use a paper clip or similiar to hit the reset button located behind the screen.

 

 

Remember that a master reset will not clear the user name from the phone. The only way to get the username changed is to call T-mobile and have them detach the IMEI (under the battery) of the phone from the old username.