Looks like we have a biggie here. According to reports, not only Verizon users are having problems with data usage on their iPhone. The handsets are using up too much data, but it’s the result of a bug. Apple already issued the patch for Verizon.
However, AT&T and Sprint are still having the problem. One AT&T user reportedly, picked up more than $100 in overage charges. Another says that his phone ate up 2GB of cellular data in three days. The bug seems to be the result of the handset not switching to wifi when in a hotspot. Whoops.