At least with my provider (AT&T), it's the same with SIM cards. They associate the SIM with the phone, and you can't just swap the SIM into a new phone. Last ti

At least with my provider (AT&T), it's the same with SIM cards. They associate the SIM with the phone, and you can't just swap the SIM into a new phone. Last time I did this, I had to actually go into the store in order to get a brand new SIM paired to my account and the new phone, and the old one was permanently de-activated and thrown in the trash. I'm assuming it's a move to try and make life inconvenient for people who want to buy used phones instead of getting a new one through them.