Hard reset Vivo U3 Option 1
1. Go to Settings
2. Click on the menu About Phone
3. Next item Storage
4. Then click on Factory data reset
5. Mark opposite Factory Reset and Format disk
6. Click on Start cleaning
7. Reset will complete after Vivo U3 restart.
Hard reset Vivo U3 Option 2
1. Need to turn off the smartphone Vivo U3
2. Press Volume Up + Turn on for a few seconds
3. Stop pressing the buttons when we see the brand logo on the display
4. Click Clear Data
5. Click on Start
6. The reset process will end after Vivo U3 restart.
To fully perform a complete reset of Vivo U3, a battery charge of about 80% is required.
When the reset is completed, all personal applications and data installed in the memory Vivo U3 will be erased.