So, I've been swapping my AT&T sim between my iPhone 5s and my Windows Phone. I've noticed that the tethering feature under WP 8.1 says I have to call AT&T to activate tethering. Thinking nothing of it, I put my Sim back into my iPhone after restoring it from a jailbreak. I did this when it said a sim was required on the set up screen. I've noticed that Personal Hotspot has disappeared from my settings. When I go to cellular and set up personal hotspot, it tells me to call AT&T or go to some website to enable it. This is just like the message I got on WP 8.1. Anyone know what to do? Do I have to pay money to get this functionality back? It is very important that I get this functionality back, since I need it to get on the internet with my Mac at school to send and receive assignments via email.
I guess if I can't enable this it won't be a big deal, since I can just airdrop stuff from the phone to my Mac. Still, this is very odd. Why did this feature disappear just because I've been swapping my sim back and forth between phones?