Let me start off by saying that my wireless experience is limited to a six-year-old pay-as-you-go AT&T cell phone ($25 / 25 minutes per 90 days). I'm about to buy my first iPad, and would have done so a few moments ago, except for this: Initially I thought I'd get the Wi-Fi only model, since I really don't need (at this time / don't want to commit to) monthly carrier service. But, I thought that maybe someday I would regret that decision and wish I had bought the Wi-Fi + Cellular model "just in case." For $130 more, I'd risk it, thinking this would be a lot cheaper than maybe / possibly buying an entirely new, fully-featured iPad someday in the future. But as I selected my desired options on the iPad Air "Shop Now" page, the last option was forcing me to select a carrier (one of four offered) and saying that the iPad Air would only work with the carrier I select (right now, when making the purchase). I was (naively?) thinking that I could make that decision later on, with carrier selection / implementation made via connecting the iPad with the carrier's local rep or website. So, if I'm not ready to commit to any carrier service at this time--let alone trying to figure out the best deal for my (unknown level of wireless/cellular air time use)--am I forced, then, to just buy the Wi-Fi-only model? Please advise. Thanks.