FIX THE EXCESSIVE DATA USAGE PROBLEM
Turns out the problem is that Apple ships iOS5 with iCloud data syncing over cellular networks ON by default. This means all the documents and data stored on your phone for all the applications you have installed on your phone will be automatically uploaded to iCloud, decimating your puny cellular data plan you thought you’d never burn through.
If you are experiencing super high data usage on iOS5, just follow these steps:
- Navigate to: Settings -> iCloud -> Documents & Data -> Use Cellular
- Turn it OFF
- Fight with AT&T (or other wireless carrier) about your excessive data usage charges
Also check the Data & Diagnostics and the Automatic Store Downloads.
- Diagnostics & Data: Settings -> General -> About -> Diagnostics & Usage -> Don't Send
- Automatic Downloads: Settings -> Store -> Set Use Cellular Data to Off
Why Apple would ever think its a good default to sync data and documents for all your phone’s applications over a cellular network in the world of severely limited data plans and usage based billing is beyond me. This, and the widespread battery issues with the iPhone 4S and iOS5 seem to indicate Apple didn’t do nearly enough field testing with the new phone or OS. Let’s home they learn from this in the future.
As posted on http://www.vancelucas.com/blog/excessive-data-usage-with-iphone-4s-ios5/