Unlock Sony Xperia C Pattern Lock
https://gsmfixer.blogspot.com/2015/08/unlock-sony-xperia-c-pattern-lock.html
Here is a method to unlock the pattern lock of Sony xperia c without Google account by hard reset method. You can hard reset you Sony Xperia C by hardware keys. Please be careful while hard reset and take full backup of you data.
1.Power off your phone
2.Press and hold volume up+ Down +power button, when android logo appear press camera key
3.Select with volume keys "wipe data/factory reset" and press power to confirm
4.Select "yes" and press power to confirm
5.Wait until format ends
6.Press power key to confirm "reboot"
7.Wait until the phone restarts
1.Power off your phone
2.Press and hold volume up+ Down +power button, when android logo appear press camera key
3.Select with volume keys "wipe data/factory reset" and press power to confirm
4.Select "yes" and press power to confirm
5.Wait until format ends
6.Press power key to confirm "reboot"
7.Wait until the phone restarts