From the Motorola website ...
This will remove any temporary files that may be causing the problem, but will
not delete your files or settings.
1. With the phone powered off, press the
VOL DOWN KEY for 2-3 seconds then
POWER key then release.
2. The device will display different
BOOT OPTIONS
3. Use the
VOL DOWN Key to SCROLL to
Recovery and
VOL UP Key to select
Tip: If the device reboots, you may have waited to long to make a selection, you will need to begin the process again.
4. The device will display the Motorola logo and then the Android in distress ( logo with Exclamation mark)
5. Press and hold the
VOL UP key for 10-15 seconds. While still holding the
VOL UP key tap and release the
POWER key
Tip: You can try this step, holding the phone in landscape. If you are stuck on step 6, try a force reboot by pressing the Power key and Vol Down key, and start the process again.
6. The device will display additional menu options (Text will appear in
BLUE)
7. Use the
VOL DOWN Key to scroll to
wipe cache
partition and the
POWER Key to select this option
8. The device will then perform the
partition wipe
9. The device will reboot and start the normal power up sequence
From Verizon website ...
Performing a wipe cache partition removes any temporary files that may be causing an issue with the device. All personal files and settings are not be affected by this option.
- Power the device off.
- Press and hold the Volume down button then press the Power button and hold both buttons for three to five seconds then release both buttons.
- From the Boot Mode Selection Menu screen, select Recovery.
Utilize the Volume down key to scroll through the options and Volume up to select.
If the device reboots, you may have waited too long to make a selection. Restart the process.
- From the Droid triage screen:
- Press and hold the Volume up button.
- While holding the Volume up button, press and release the Power button.
- When the Android system recovery screen appears, release the Volume up button.
- Select wipe cache partition then press the Power button.
Utilize the Volume buttons to navigate the options.
The device restarts.
... Thom