Anyway, the S3 has a micro SIM card, so I can't use it here, don't have an adapter so me and my girlfriend decided to make one, lol.
We were bored so meh, I have like 5 T-Mobile SIM cards laying around, so yeah..
This is what we did.
Original regular sized SIM card:
Original Micro sized SIM card:
Regular sized and Micro sized SIM:
Taped them together:
Cut the outline out:
Taped my S3 micro SIM into the newly made adapter:
Yay, it worked!