How to bypass activation lock on my iPhone 4S?

I have an iPhone 4S that was given to me by my brother which he got from his friend and his friend got it from his dad. His dad has bad memory and is of old age and doesn't remember the apple id and password. Is there any way I can bypass the activation lock. I'v e heard of hacktivate before on youtube but I still don't know too much about it. If so can someone give me the step by step process. It would be much appreciated!

You need to reset it -> http://www.justtext.com/messageboards/20140127092428.html

You can't at all. Due to the ios 7 update if prevents people using stolen property