Need help unlocking or reseting 3650 at&t

[Fuvibo1]

i have try the nokia unlock code software provide by the web site but it gave me 5 bad code and now my phone is lock, want to know how to reset the phone so i could try to unlock it again, if someone could help me out i would greatly appreciated
my serial # is 351102500754790 for my 3650 with at&t