Asus ZenFone 2 AT&T Connectivity

[transparenthuman]

You shouldn't need another IMEI to get LTE working on AT&T. I have a US Zenfone 2 Deluxe (you do need a US variant, the world edition is missing some AT&T bands). The default APN on my device was phone, which doesn't support LTE. I set it to NEXTGENPHONE. I lost all connectivity on that APN, so I contacted support, I gave them my real IMEI and my phone is working just fine on LTE now.