iTunes to iPhone "Unknown error 0xE800007F"

Same exact issue with iPhone 4S , iTunes 10.5.1.42 using wi fi sync. iPad 2 and iPhone 4 do not create this error and they both sync via wi fi as well.

I have had all the above issues with iphone 4S since IOS5 & update to itunes 10.5.0.142. I have wifi sync enabled & this happens when I have no power connected to my phone. I've noticed I get the error message when I am receiving an email on my iphone, or anything where 'push' is used, notifications etc. It's so annoying as when I'm working, itunes will sunddenly go full screen, covering up what I'm working on. Then it takes a few clicks to get back to what I was doing. Shame on you Apple, get it sorted pronto!

You can schedule an appointment with an apple rep to call you at your convienence. It works great just look through the support pages. I would hyper link but I'm on my iPhone.

As far as this issue. This is what he advised and it WORKED!

http://support.apple.com/kb/HT1925?viewlocale=en_US

Good luck all! No more errors for me! And wifi sync actually works!

"

As far as this issue. This is what he advised and it WORKED!

http://support.apple.com/kb/HT1925?viewlocale=en_US

"

I've just done this complete removal and re-install and I am still getting the error for my iPhone. Possibly more frequently now!!!

I was having major problems with iTunes seemingly related to it having problems attaching my iPhone 4S over Wi-Fi etc. Every time I opened iTunes it would find my iPad quickly and then either not find my iPhone, or find it and the sync arrows would just keep spinning - which would normally be followed by the "iTunes could not connect to this iPhone..." error. It was getting really aggrevating and iTunes was essentially unusable it was freezing so often.

The following worked for me (on Mac OS X 10.7.2 Lion):

1. Just to be safe, reboot your iPhone and restart iTunes
2. Plug your iPhone into your computer
3. Sync from iTunes
4. Uncheck "Sync with this iPhone over Wi-Fi"
5. Sync from iTunes
6. Quit iTunes
7. Open iTunes
8. Sync from iTunes
9. Check "Sync with this iPhone over Wi-Fi"
10. Sync from iTunes
11. Unplug your iPhone (it should remain in the iTunes sidebar connected Wi-Fi)
12. Sync from iTunes one last time (it should sync over Wi-Fi).

I know this seems absolutely ridiculous and overkill, and it is. I'm not sure if every step is needed but these steps / overkill worked for me. The difference is like night and day. iTunes opens fine now and finds my iPad and iPhone fairly quickly - or at least as quick as it used to, and no error messages.

I also followed the instructions at http://support.apple.com/kb/HT1925?viewlocale=en_US hoping it would fix this problem. At first I thought that it had fixed it since I didn't get the error message for a couple of days. But just today I got it again. So much for uninstalling and reinstalling.

I also noticed that their instructions don't really completely uninstall iTunes because after reinstalling it, all of my settings were still intact. I didn't have to re-register my iPods or set the custom location for my music files, etc. It was as if I had never uninstalled it.

I did all this yesterday - the plug in, sync, un-tick wifi sync, etc., etc., etc. Still get the same error.

Another "me too" reply.

Windows XP, iTunes 10.5.1.42, two iPhone 4's and iPad 1 set to sync over wi-fi. I get this error so much that iTunes is frozen nearly all the time.

Me too another one of the joys of 10.7

I am seeing the same problem on 6 computers with different iPods and iPhones. This means the over the air updates are rendered useless because this dialog locks up iTunes until someone clears it.

I've searched and searched...I could not find one valuable fix or work around solution. With a 8 page thread like this it looks like we might have to sit this one out till a fix comes out.

You would think that with all these posts showing up that Apple might post something to follow-up to see what might be the cause of this issue. It is interesting that this error message did not pop up until Wifi sync started. There is also absolutely nothing on the Apple Support site about this error code.

I'm getting this error with iTunes 10.5.1 on a Win 7 system with an iPhone4.

- Merg

Same here, occasionally. iPhone 4S, iOS 5.0.1, iTunes 10.5.1, OS X 10.7.2.

Add 2 more iphone 4s's to this list

same here- annoying! iPhone 4s , iTunes on my laptop with windows vista.