Question about Apple iPad Air 2

I have been travelling with an iPAD Air with cellular data. I have a swisscom contract just for my iPAD which costs me 19 CHF for 300 MB data. I have used the same service (at varying costs) across the globe from Asia to USA and it always works. As I say you will see the costs of the various data packages when you go into the mobile section of your settings. There is the ACCOUNT section which will show you what mobile packages you can buy. This is normally defined by Region and so the pricing is predictable. I find this works really well and would recommend it.