T-M states band 12 is a no-go currently with Nexus 5X/6P

Isn't that the band Fi utilizes with T-M?

My Fi "Gen 1" Nexus 6 has connected to any LTE band that my T-Mobile tower serves up, including Band 12 LTE 700 and Band 4 LTE AWS (I have screen snaps of those signals). So, yes, as long as the phone and your T-Mobile tower is capable of Band 12, then it will be used for Fi - otherwise, if the phone and your T-Mobile towers are capable of using other T-Mobile LTE bands then they can and will be used instead.

Oh, and BTW, there is a lot of back-and-forth right now in the Fi Google+ forum on the issue of the "Gen 1" Nexus 6 on Fi being able to connect to Band 12 LTE 700 but NOT being able to make VoLTE calls (IOW, you can get data but not voice on a Fi Nexus 6 - the N6 apparently drops down to HSPA ) ... Seems that T-Mobile's official, public "position" is that you can't have Band 12 LTE 700 support on the T-Mobile network unless your phone support VoLTE and e911, yet a Fi Nexus 6 doesn't ....

Which all appears to mean that Fi's MVNO agreement with T-Mobile allows Band 12 LTE 700 data connections but not Band 12 VoLTE - so maybe all the hoo-hah on the new phones is less about the phones' ability to use Band 12 LTE 700, and more about what T-Mobile will allow Fi phones to do when connected to Band 12?

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Alex
 
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Users that updated their Fi Nexus 6 to Android M via factory image are reporting that they are no longer able to connect to T-Mobile band 12 for data.
 
Users that updated their Fi Nexus 6 to Android M via factory image are reporting that they are no longer able to connect to T-Mobile band 12 for data.

Thanks for the pointer - was just reading about that. That means T-Mo is back to the ******* stepchild for me as far as coverage near my house (one tower, 4+ miles away and over a ridge).

Tempted to wipe my N6 clean and flash M with the Fi SIM out, then re-activate while in my car between the one T-Mo tower and the one Sprint tower, and hope that my N6 learns the Sprint tower again (been keeping my phone in Airplane mode at home due to the Sprint + N6 "missed calls" issue while on WiFi, and that probably helped my N6 to "un-learn" that Sprint has a better signal at my house than T-Mo does).

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Alex
 
Correction, only Project Fi users on M can't access T-Mobile Band 12, normal T-Mobile customers can access Band 12 on their Nexus 6 with M. I know, I put my T-Mobile SIM back in, and Band 12, as well as the hidden settings under cellular, came back.
 
Correction, only Project Fi users on M can't access T-Mobile Band 12, normal T-Mobile customers can access Band 12 on their Nexus 6 with M. I know, I put my T-Mobile SIM back in, and Band 12, as well as the hidden settings under cellular, came back.

This is the project Fi forum.....