AT&T’s Nexus 6 units are apparently affected by a software bug. This is so bad that the carrier is now telling its stores to return their initial shipments of the smartphone to Motorola in order for it to fix said software glitch.
The info reportedly comes from multiple sources, one of which even shared the screenshot you can see below, which is purported to be from an AT&T system.AT&T Nexus 6 bug
The bug renders a black screen and keeps the Nexus 6 from connecting to the network when it’s powered on, thus essentially making it pretty much useless. Luckily, there have been no reports of early owners of the AT&T Nexus 6 to go through this, and Motorola has already identified “the root cause” of the issue. Obviously though, if you have an AT&T Nexus 6 and have had this happen to you, you should contact the carrier immediately.
Shipments with good software are being prepared by the manufacturer, and new inventory availability for AT&T stores will be communicated within the next few days. Again, only “initial shipments” of the Nexus 6 for AT&T have the bug.
It doesn’t seem like the bug has made it to any other variations of the first Nexus phablet. AT&T’s iteration is a bit special when compared to most, since it comes with a special boot animation and it even features the carrier’s logo on its back.
Motorola has asked the store to return the initial units left in their inventory and if any customer comes to store with impacted Nexus 6 then they can exchange such device under Equipment/Accessories Return and Exchange Policy. The arrival of new inventory of corrected software device is not mentioned at present which means that Nexus 6 might not be available from AT&T stores for some days but AT&T can still sell the Nexus 6 units via Direct Fulfillment process.
Sources: Droid-Life & Gadgetz Arena