I've had sporadic problems for awhile anytime I shop on Amazon's site for kindle books. I already spend a decent amount of time shopping on there and it's easier for me to just buy the books on their site, if they don't have it on kindle I will often times buy a paper copy. But the syncing leaves much to be desired. If I buy directly from the kindle I don't usually have a problem with downloading but it's so much easier to shop on their site. I don't have the problem if I purchase and have it sent directly to my iphone. This morning I spent way too much time trying to get the kindle to sync my new purchases. Would have been way faster to just DL the books to my computer and used the USB port. This is annoying. I can't send it back for replacement, it's over a year old. I had to do 2 resets this morning. I did finally get my new purchases on the kindle through syncing but it was time consuming, annoying and a PITA. It's not a signal issue, I get on the kindle store no problem.