How does it work? Last night at Suncorp my phone would not do anything that involved Data and was dodgy with texts and calls but I had 4 bars of signal and 3G lit up according to the screen. Its an iPhone 4s on Optus. Does the local tower just get overwhelmed with high volume use from a single concentrated point as people Instagram and Text and Facebook and Twitter and Foursquare? It wasn't just me - my daughters friend had the same issue (different carrier) and apparently the girls next to them couldn't log onto whatever site they were trying to use. Putting aside the pathetic dependence and overuse of social networking and the deplorable situation where people at a Rugby game play with their smart phones instead of being absorbed in the game - whats going on?