We recently had an AT&T repeated installed at work and my 0 bar signal on my iPhone has gone to full capacity ever since. So why is it that I can’t use iTunes on my phone for the life of me? I have to continually quit and restart it (thanks iOS 4) because I get “Cannot Connect to the iTunes store” and “Cannot play preview” errors. Sometimes I can buy songs, sometimes I can’t. What’s be deal?! Is it AT&Tor is it all the iPhone 4 activations. I want my iTunes!!!