Shortly after the iPad Air began selling there were complaints (issues) regarding off-color screens (yellow band at left side, sometime also pink on the right side) and connectivity issues (most often [?] when accessing a couple of specific web sites). I've been waiting in the wings for these to be resolved. If these concerns have now disappeared, I'd love to have a serial number which would establish in manufacturing time the point after which it would be really safe to buy an iPad Air now. I really want to minimize my chances of receiving a dud right out of the box; been there, done that (with previous iPod purchase, a real PITA). Thanks.