Oneplus One hard reset using buttons

How to reset your password or unlock pattern on OnePLUS mobile

Back up all your important files and information, as the process may erase all data.

On OxygenOS - Power off your device Press and hold volume down + Power button. ( device will boot into recovery mode ) Select Language Select Wipe data and cache > Wipe data and cache and tap Yes Now Reboot system from " Reboot" option.
   

On Cyanogen OS - Power off your device Press and hold volume down + Power button. ( device will boot into recovery mode ) Select Wipe data/factory reset > Yes-- delete all user data Select Wipe cache partition ( You'll notice Android bot with erasing... for a second ) Select Reboot system now

 

OnePlus slow or random reboots

What shall I do if my OnePlus one mobile freezing?

Make sure if your device is up to date. If the issue persists, please back up your device and perform a hard reset.