Share your experience!
My phone keeps saying "incorrect login" despite me entering the correct login.
After some time it allows me to login.
This is causing me a serious problem as I need phone for work!
Clear login, restart and create a new login, is that a solution?
settings-> lock screen & security -> screenlock
Try a pattern, see if that's better for you. (write it down to be safe)
Does it happen in safe mode too?