Tap on (sometimes found under "Backup & reset"). Select Erase all data (factory reset) .
Confirm by tapping and entering your PIN or pattern if prompted. Quick Comparison of Reset Types Hard Reset (Recovery) Factory Reset (Settings) Primary Use Case Device is locked/frozen General maintenance Data Loss Complete wipe Complete wipe Access Required Hardware buttons only System menus Important Troubleshooting Tips hard reset sunmi v2s
The V2s will boot like it just left the factory. You will need to re-pair your printer (if it acts up, run the built-in "Printer Self-Check" in settings) and reinstall your POS app. Tap on (sometimes found under "Backup & reset")
Go to Settings > Accessories > Printer . Run the Test Page . If it prints garbage, reboot. If it prints nothing, you likely need to re-flash the printer firmware via Sunmi's "Toolbox" app. Quick Comparison of Reset Types Hard Reset (Recovery)