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.