Most of the tech sites seem content discussing the new emoji available in the Android 6.0.1 update, but Android Police has dug a little deeper and found something potentially more important, at least for TMO subscribers—full support for Band 12 on the Nexus 5X and 6P.
For those not 100% clear on the importance of Band 12 support (like the Canadian writing this), AP does a pretty good job breaking it down. Basically, T-Mobile uses Band 12 for voice over LTE calling (VoLTE). Since there are areas in the United States where TMO’s only coverage is on Band 12, devices have to be certified to support that band.
Did I get that more or less right?
AP installed Android 6.0.1 on both the 5X and 6P and has confirmed Band 12 support for both phones. The only catch is that there’s currently no OTA update available—if you want Band 12 support right now you’ll have to flash the latest factory images yourself.
Source: Android Police