Hi there, I was wondering if it was possible for me to switch from the Galaxy S7 to the Galaxy S8 without having to change my current plan? I am a monthly customer, but I don't use a tab. I assuming it would be possible to do so if I just simply purchase the phone fill retail price and move the sim card from my s7 to the new s8 phone since they both use nano sim cards. Could anyone confirm this for me? I would appreciate it. Thanks.