Welcome to 'Merica, the land of liberals, infinite taxes, and idiocracy. If I have a 4GB data plan, then I should not have to pay extra to use it for a hotspot.
Did that make sense to you when you wrote it? If not, why'd you post it? If so, seek help/get your meds checked.
As for paying extra to use it for a hotspot. Avail yourself of the free market and choose another carrier.
----------
What I've noticed is that my phone shows up in the Personal Hotspot section when I don't need it, but generally not when I do.
For example, right now, I'm sitting at home, with my 2012 rMBP connected to my home network via both GigE/Thunderbolt, and WiFi. My phone is sitting next to me, locked, with a WiFi connection to the same network. So, of course, it shows up in the personal hotspot section in the WiFi menu.
Last night though, I was at a meetup, and after using my phone to look something up, I decided it would be easier to pull out my laptop and tether it. I locked the phone, put it in my pocket and pulled out my laptop, opened it, and checked the WiFi menu. No personal hotspot. I waited and tried again. Nope, still not there. I pulled out my phone and unlocked it. Still nothing. I switched to the personal hotspot section in settings. I checked again. My phone showed up in the WiFi menu, in the same section as a bunch of other WiFi nets in the building, and yet, it knew it was an iPhone, because it had the linked chain icon.
That doesn't seem right, does it?
