After last night's news that the AT&T-sold Nexus 6 has the carrier's logo on the back of the device as well as the boot screen, you just knew there was more to come, right? Well, that time is upon us. It appears that the carrier's Nexus 6 variant is SIM-locked, won't let you tether without verifying your subscription status, and has AT&T's suite of ringtones as well.
It should be noted that none of these things mean that AT&T has a different ROM than any other Nexus 6 - quite the contrary, in fact.
AT&T's Nexus 6 Is SIM-Locked, Checks Mobile Hotspot Subscription Status For Tethering, And Has The Carrier's Ringtones was written by the awesome team at Android Police.