How to prevent iTunes Match from exceeding your iPad cell-data limits

How to prevent iTunes Match from exceeding your iPad cell-data limits
The simplest way to prevent iTunes Match from using your cell-data connection whenever a Wi-Fi link isn't available is to disable the service's use of the iPad's 3G network: click Settings > Store and set Use Cellular Data to Off. Alternatively, you can disable all cell-data transfers by choosing Settings > Cellular Data on the iPad or Settings > General > Network on the iPhone and switch the Cellular Data setting to Off. Of course, you'll have to turn the setting back on whenever you want to use the device's 3G connection to transfer data.The questionable utility of AT&T's 250MB-per-month iPad data planSeveral people posting to Apple Support and other forums about iOS devices automatically switching from Wi-Fi to 3G connections question the usefulness of AT&T's cheapest $15-per-month data plan, which limits transfers to 250MB per month. The company charges an additional $15 for each 250MB customers use above the limit in a 30-day period. The $25-per-month plan allows up to 2GB of data transfers per month and charges $25 more for each additional 1GB of use per month.Some iPhone users are surprised at how much more data their iPad apps use compared to their iPhone counterparts. That's why it can be a mistake to base your iPad data needs on the amount of data transferred to and from your iPhone. If you opt for AT&T's $15-per-month 3G plan for the iPad, you'll likely need to set the device to restrict manual cell-data transfers. Either that or resign yourself to the company's monthly over-limit charges.