Amongst the many new features included in the iPad Air 2 and iPad mini 3, we've come across an interesting one specific to the cellular models. It's a new pre-installed, Apple-branded SIM that allows you to switch seamlessly between participating US and UK carriers.
We've seen a number of Apple-filed patents pertaining to such an invention over the years, with some even speculating that the company was looking to become a wireless provider. But it appears it just wanted to make it easier to use the iPad with short-term data plans.