iPhone 5 or earlier Iphone "Hello screen" problem

[Pitrop24]

After i restored an iphone that my friend give to me it showd the hello screen and after i slide it it told me to connect it to itunes and after i connected on my computer it sad this apple divice is linked to an apple id with the email... or some thing like that and i dont know the id or password. Is there a tool that can bypass this?
p.s. is an iphone 4s

 

[Newtons Apple]

After i restored an iphone that my friend give to me it showd the hello screen and after i slide it it told me to connect it to itunes and after i connected on my computer it sad this apple divice is linked to an apple id with the email... or some thing like that and i dont know the id or password. Is there a tool that can bypass this?
p.s. is an iphone 4s

It is a security feature and you friend gave you a locked phone. Only way to bypass is showing Apple a copy of the receipt for the phone. If you paid your friend for this phone, tell them you want your money back.