I have an original iPad, but the question you pose would apply to any tablet that can be purchased with or without cellular capability.
With the orig iPad, you don't get
complete GPS functionality unless you have the cellular capable version. Here's a link that explains this:
ClickyEven though my iPad has built-in cellular capability, I normally only use it in WiFi mode with my phone's hot spot as the internet connection. This gives me full gps function. Kindle may handle their GPS implementation differently, so do some research so you can make an informed decision.
I've turned on the iPad's internal cellular access a few times when phone hot-spot access wasn't practical and I was soooo glad to have it.
Millenicom allows you to turn their data plan on and off, but they charge you each time you reactivate it. Be sure to read the fine print.
I would definitely get the 4G LTE model.
Hope this was useful
