Hi, I just got an iPhone 4, about 3 days ago. I snapped 3 or 4 pictures and then when I synced with my laptop, several other pictures showed up on my phone. I do not recognize these pics. What I dont know if is these pics could be somehow hidden on the phone or they were synced from my computer to my phone. (As far as I know, nobody has used our computer, nor synced their phones) I told a friend and he told me to check "Usage" under settings, but I am not sure what it means. Under "Time since last full charge" it says some minutes, but under Call time, "current period and lifetime" says 3 days and 15 hours, there is no way I have been calling that long. Firmware on the phone is the newest 4.3 Is there a software or some tool to know if I was sold a used phone?