Remove activation lock on iPhone

Activation lock can only be removed by the user who activated it. It is a theft deterrent feature, and if there was a way to bypass it then it would be useless to deter theft.

If you personally purchased the phone new from Apple or an Apple authorized reseller, and have the original receipt that matches a form of identification that you can provide, and you forgot your Apple ID information to remove activation lock yourself Apple may be able to help. But if you bought the phone used your only option is to return it for refund or as the seller to remove activation lock.

This is what they have to do→How to remove Activation Lock - Apple Support

Here is how to get that Activation Lock removed.

How to remove Activation Lock - Apple Support