iphone 7 activation problem ?
 

i've bought an iphone from ebay which has icloud activation lock (which i don't know the pass)but i can still be able to use it and go thru menu,,
it's AT&T original ,when using a att sim will not ask for activation but when inserting a new sim go's to start up screen and asks for activation (email+pass)... any idea how can i bypass it ??

thanks