A factory reset will erase all apps, accounts, and data from the device, and will re-add the Cents pre-program apps and settings after the reset.
Steps to Factory Reset
On the SUNMI T2s, go to Settings.
Scroll down and select System.
Tap Reset options.
Choose Erase all data (factory reset).
Confirm by tapping Reset device.
Finally, select Erase everything to begin the reset.
Your SUNMI T2s will restart and take several minutes to reset. Once complete, it will power on and display the setup screen, just like when it was brand new.
After the Reset
Reconnect the device to Wi-Fi.
Follow the Sunmi Initial Setup Guide