When the E815 becomes unresponsive, removing and replacing the battery is often the first and best solution.
To replace the battery, you are going to:
- Remove back cover
- Remove Battery
- Replace Battery
Locate the back cover release slide.
Use your finger to slide it down.
Remove the back cover by pulling it away from the phone.
Locate the battery removal slot.
Use your finger to pull the battery out from the top.
Remove the battery.