A:Answer I think you are a little bit confused about the meaning of "unlocked" iPad. To understand this, first we must divide this iPad model into its two sub-models: the ones with Wi-Fi only and the ones with Wi-Fi + Cellular. Now, the Wi-Fi + Cellular models are the only ones that are defined as "unlocked", as it means that it does not have a Cellular Carrier (Verizon, AT&T, T-Mobile, etc.), but you can come into any of these carriers to "activate" your iPad. By doing this, you will have access to the carrier's 4G LTE network, which then allows you to use you iPad with internet connection on places where there is no Wi-Fi available. Essentially, just like a smartphone.
And, just as a smartphone, again, you will have to pay a monthly fee for this cellular connection. Depending on the carrier and the plan you choose, the monthly fee charge varies. I would say that you are looking at around $50 a month for an unlimited cellular plan.
But let's say you buy this Wi-Fi + Cellular model and do not activate it. Well, you won't have the cellular connection, but you would have GPS which is a hidden feature that this model has. But the price increase is not worth it.