alex, if you are talking about resetting your phone to factory defaults, follow these instructions. for a hard reset follow these instructions "Please note that all data will be deleted from the Motorola ATRIX 4G as a result of this procedure. This process may or may not delete data stored on the microSD card. We recommend backing up all of your personal data before proceeding.
First, try this:
From the main home screen, tap menu
Tap Settings, then Privacy
Tap Factory data reset
Tap Reset phone
Enter your password if required, then tap Erase everything to confirm
If that doesn't work, or if your phone is frozen:
Turn the power off. If your Motorola ATRIX 4G is frozen, pull the battery out and reinsert it
Press and hold the Power and Camera buttons
Release the Camera button when prompted
Press and hold the Volume Down key
A yellow exclamation will appear on the display
Select Factory Reset and press OK
All data including third-party applications will be deleted from the Motorola ATRIX 4G. Once the wipe is complete, the phone will reboot to its factory fresh state." from here. Hope this helps, good luck.