Try unlocking your phone through codes. It’s the simple and best and easiest way to unlock any mobiles. You can re-enter the codes again even if you entered it wrong since you have a certain number of attempts to enter the code. So its better to unlock mobiles using codes. You can get the codes from your service provider itself. If they fail to provide the codes you can go to other sources like online providers like Classicunlocking.com
who provide the codes.