We can remove security code on Nokia Lumia 535 with hardware keys to reset all settings. If wrong password entered many times , then mobile on screen try after 174564 minutes or less minutes. It mean you can enter your exact password after these minutes. If you want to reset to use device urgently then follow the instructions as mentioned below step by step. Take backup before reset your smartphone to its factory default settings.
How To Remove Lock On Nokia Lumia 535 Via Keys
1.Power off Nokia Lumia 535
2.Press the Power-Button once
3.Press and Hold the Volume-Down-Button until you see the exclamation point (!) on your screen
4.You can now release all buttons
5.Press the following buttons below once in exact order
Your phone will start the Hard Reset shortly.