Choose your iPad by carrier.
If you decide on an iPad with Wi-Fi + 3G, be sure to select the model that corresponds with the carrier you’d like to use for 3G service. The iPad model you purchase is specially configured to work with either AT&T or Verizon — not both. So while you don’t have to activate 3G service right away, you should choose your iPad with Wi-Fi + 3G according to the carrier you prefer.
When you decide to activate 3G data service, you can choose the amount of data per month you want to buy — with no long-term contract. So if you have a business trip or vacation approaching, just sign up for the month you’ll be traveling and cancel when you get back.
Turn on 3G data. Or turn it off. All from your iPad.
Sign up.
Tap Settings and choose Cellular Data. Then select a plan and enter your payment information.
Check your usage.
iPad lets you know when you’re about to reach your data limit so you can add more.
Adjust your plan.
If you want more data, you can sign up for a different plan — or cancel 3G data service altogether — anytime, right from your iPad.