Hiii!
I am looking to purchase an Apple Watch for my boyfriend (who is American, on an US phone plan)
I live in Canada. I am wondering if I purchase the watch in Canada with the 3G/Cellular feature, will he be able to set it up through his ATT phone plan?
This is refers specifically to iPhone but probably covers watches too:
Make sure it will work in your country! --> LTE Find the right iPhone for the right country or region. - http://www.apple.com/iphone/LTE/
and https://en.wikipedia.org/wiki/List_of_LTE_networks
Also check if your intended carrier requires a CDMA or GSM phone.
Purchasing Apple Watch in Canada - Can you set up on a US Network
