LG L Prime hard resetUsing the Hard Reset (LG D337 Factory Reset)
If your phone does not restore to its original condition, use a Hard Reset (Factory Reset) to initialize it.
1 Turn the power off.
2 Press and hold the Power + Volume Down Key on the phone.
3 Release the Power only when the LG logo is displayed, then immediately press and hold the
4 Release all keys when the Factory data reset screen is displayed.
5 Press the Volume Key to scroll to the desired option, then press the Power to confirm.
6 Press the Volume Key to scroll to the desired option, then press the Power to confirm one more time.
You can use LG Mobile Support tool / LG PC Sync to repair some LG cell phone model, after download select menu Customer Support > Recovery Phone
To soft reset your LG L Prime D337 remove and reinsert battery.
Use LG PC Sync to backup / save your important data.
If you have forgotten your LG D337 lock pattern:
If you logged into your Google account on the phone but failed to enter the correct pattern 5 times, tap the forgot pattern button. You are then required to log in with your Google account to unlock your phone. If you have not created a Google account on the phone or you have forgotten it, you will have to perform a hard reset.
Caution: If you perform a factory reset, all user applications and user data will be deleted. Please remember to backup any important data before performing a factory reset.