I’m an old guy, and can’t seem to break my habit of using iTunes to do my updates, instead of Over The Air, the way everyone else does it.  If you’re part of the OTA crowd, you can quit reading now.

I’ve seen (with more regularity than I’d hoped) these two problems:

1) Often one or two updates will download painfully slowly, while the rest just whiz right by.

The fix is to open the downloads window and pause the download. Count to two, and resume. 99%  of the time, it starts downloading at full speed.

2) Sometimes (albeit much less frequently than #1, thankfully) I’ll get a message that “The app “(name)” was not installed on the iPhone “(name)” because an unknown error occurred (0xE800002D).” 

The fix is to show the list of apps on your device in iTunes by clicking on “Apps” in the left-hand column. You’ll get the  usual list of apps in a new column to the right, and another (larger) column to the right of that named “home screens.”  Now, in the list of apps, find one of the apps that would not sync/install, and click/hold/drag it to one of the screens and release.  So far, that  has always worked to re-initiate the sync attempt, and will sync not only that particular app, but all the rest that would not sync as well.

YMMV, but HTH.

Tracy