If you have issues with your phone constantly power cyciling on and off, It may not be the phone. A corrupt memory card may be the culprit. To test this, Remove your micro SD from the back of the device then reboot your phone. If the phone power up as normal, remove the battery door and place the SD in the phone while it is still powered on. If the device reboots itself, then you can bet it's the card. To solve the issue, you should put your SD in a card reader and attatch it to your PC. Click computer> left click the drive letter of your card reader>click properties>format> checkmark quick format option>ok. This WILL erase all content on your SD. However, you can put the SD back into the phone and from the storm hit setup>options>memory>then hit the BB key>format>media card. You will now be able to use the phone as usual again.