Re: nokia lunia 535 locked
If you or someone else enters an incorrect lock screen password repeatedly this will happen
If you've entered the wrong password 5 times, the phone will be locked for 1 minute. If you enter another wrong password, it'll be locked for 2 minutes, then 4, then 8, and so on.
If you just aren't able to come up with the right password, you'll need to reset your phone to factory settings. Contact your mobile operator, check their website, or look through your phone's documentation to learn how to do that. For more info, see Reset my phone.