For Hard reset T-Mobile Sidekick use following steps
1. Before Hard Reset (reset to factory settings), turn off your smartphone
2. Press and hold the Volume Up and Power buttons for a few seconds
3. The keys after the T-MOBILE logo appears on the screen, you can release
4. From the menu sections select the item "wipe data / factory reset", the Volume Up / Down keys are used to navigate the menu, and the Power key to confirm the choice made
5. Select the line "yes" and press the Power button
6. Go to item "reboot system now"
7. Hard Reset procedure completed
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