I have a problem with my pc windows .I have an Asus and I installed itunes. In the first all ok but and a week that I have problems with synchronizing with iPhone 6s. He tells me (when the attack on the pc) -53 synchronization error. I provoto everything but nothing ..... and when I go on pc itunes store tells me to update ios 9.2.1 ... but there already !!! on iphone help me ...... !!!!!
iPhone 6s, iOS 9.2.1
For the error 53, see this link:
As far as the iOS 9.2.1 updates, yes there are two of them but they have different build numbers which iTunes doesn't show. The "newer" update can ONLY be installed from iTunes (for some technical reasons I won't go into here) and that is why it doesn't show on your iPhone. If you are not having any other problems, you can choose to install the "newer" update or not. It is a 2 GB download, so be patient if you decide to install it. There are other discussions about this issue on this and other Apple forums. Do a search on iOS 9.2.1 if you really want more info.
itunes sync and ios 9.2.1 update that I have on ios iphone
