Originally Posted by myeyez
I've basically asked the same thing here - http://forum.xda-developers.com/show....php?t=2508100
Im trying to understand what IMEI number to give them when I sign up. Will they take the Nexus number or do I need to visit a store and "find" an IMEI from an ATT LTE phone?
The Nexus 5 is fully compatible with all the ATT frequencies. I don't think there should be anything to worry about as far as the IMEI goes, there is no reason the IMEI number on the label of your Nexus 5 box shouldn't work.
The only time you should have to worry about the IMEI is when you're buying a used phone off of cragslist or ebay, because if someone stole the phone or defaulted on their account, the IMEI can be blacklisted by the service provider.