Lately, I can't purchase anything from the app store. I get this generic error "We're having trouble charging this to your phone bill, most likely because you've lost your cellular connection" crap. I used to only have problems with this when connected to my microcell, but now I get the error 100% of the time no matter where I'm at. Please note that I am running GDR3, but I'm pretty sure I've bought apps post GDR3 and I had the microcell issue GDR2 back to original firmware.