For the past two months, my iPhone data usage spiked like crazy, from 200-300mb in prior months to closer to 1gb in April and May. This coincided with the purchase of the slingplayer app which seemed to justify the increased usage. However I looked at my itemized data usage on my bills and between normal waking hours, my data usage is 100-200mb but between the hours of 2am and 3am ONLY the data usage is 800-900mb. I am definitely not using my phone between 2am and 3am and even if I were, it would be on my home's wifi network, not 3g. So my questions are as follows - is this a normal pattern for everyone? Does ATT roll up an enitre day's particular type of usage into a particular time stamp? Is it possible the time stamps are just wrong? The time stamps on my phone calls and texts are correct for my time zone. Is there any way for ATT or Apple to tell me what apps are drawing down the data? Any help would be appreciated.