Originally Posted by
DCBob
It appears based on other threads and from discussions with TSA employees that PDAs and phones with large screens (like the iPhone) are least likely to have scanning problems. I have a Samsung Ace and its screen is fairly small. Yet I had no trouble with it at the gate - only at the TSA checkpoint.
Size of screen doesn't matter nearly as much as flatness and image contrast. This is why iPhones work quite well while other PDAs and cellphones do not.