1 .will. Unplug the sim card and memory card. Make sure the battery is sufficient and turn off the phone.
2. After turning off the phone, press with your finger at the same time? Function keys (screen? Physical keys on the left at the bottom of the screen)? , volume down button, power on button, waiting to appear? Samsung? Let go of your hand if necessary.
3. Then you will see four rows of blue English options. Sound? Quantity key? Choice? Choice? Arrive? Third? A choice? Shit? Data/factory? Reset? & gt press the Home key (the physical key at the bottom of the screen) to confirm (and then go to the next screen) > use the volume key to select? what's up - ? Delete? All of them? Users,> News? Home button? Return to the top of the fold after confirmation > use the volume button to select the fourth option? Shit? Caching? Partition & gt press Home to confirm >? Then use the volume button to select the first item? Restart? System? Now? & gt press the Home button to confirm, and the phone will automatically restart.
4. The restart is completed and the mobile phone is normal.
Method 2:
1. I called you on someone else's mobile phone first, but you didn't answer. Then, drop down the shortcut key on the home screen and click Missed Calls > to enter the call record field.
2. open dialing (if dialing is not displayed, press the left function key > click copy dialing) > enter * 2767 * 3855 #? At this point, the phone will restart.
3. After restarting, the mobile phone is restored to factory settings and can be used normally.