Short and honest: I'll be in the US for work soon, and am thinking about buying a US iPad Air to bring home. I live in Europe, and at home Apple products are a good deal more expensive. Are US LTE iPad Airs different from EU models in terms of hardware, frequency bands, radio chips .. anything except the power plug? Is there an official ( ) source where I can see the exact hardware differences between US and EU models? I'm obviously concerned whether the US model will work with my EU 4G/LTE carrier.