Μπορείς να δοκιμάσεις και ένα wipe του cache partition της συσκευής...
[b]Wipe cache partition[/b]
1.Turn off your device.
2.Press and hold the Volume down and Power button at the same time.
3.When the OnePlus logo appears, release the Power button, but continue holding the Volume down button.
4.At the Password screen, enter the Password or PIN number that you use to unlock your device. When done, tap Ok.
5.Tap English.
6.Tap Wipe data and cache.
7.Tap Wipe cache.
8.Tap Yes to continue.
9.Tap Reboot to restart the phone.