so I have the AT&T tethering service, bc I don't want to jailbreaky iPhone and I was wondering how it works? it's a little confusing. I thought it was going to be just like a mobile hotspot but I have to connect all other devices through Bluetooth? so AT&T tethering only works if I'm using a computer? I can't, let's say, tether someone's iPod touch to give them wifi? this Is annoying....