The device will now start the cleaning process, and it will reboot shortly. Method 2: Reset from Settings (If Phone is Accessible)
To perform a hard reset on an LG G3 (U.S. Cellular Model US990) hard reset lg g3 us cellular
This is the most reliable method for a completely unresponsive LG G3. The device will now start the cleaning process,
On this screen, press the to continue, or either of the Volume Keys to cancel. press the to continue
When the on the screen, release only the Power/Lock Key and instantly press it again. Do not let go of the Volume Down key.
If you cannot remember your screen lock PIN, pattern, or password, a hard reset is the only way to regain access.