Craigslist Ad Says The Resolution On Your Camera Must Be Set To 640 x 480 Pixels
The iPhone has one of the best cameras for both photos and video. Some Hollywood movies have been shot using an iPhone. You cannot set the photo resolution on an iPhone. The Apple operating system does not provide for date stamping iPhone photos.
There is lots of FREE Windows software online which will reduce a 8 MP high resolution photo to 640 x 480 pixels and also add a date stamp using batch processing.