T-Mobile Band 12

[googletermsofservice]

Can anyone verify this actually works? Got this phone with the intention of having better coverage from band 12, but i've never seen lte discovery show anything but band 4.

I'm on the stock rom w/ magisk, anyone have advice?

 

[William Guo]

Hi,
Can you help me to understand the difference between th band 12 and band 4? I am green to this.
Thanks advance!

 

[googletermsofservice]

Hi,
Can you help me to understand the difference between th band 12 and band 4? I am green to this.
Thanks advance!

In short, band 12 is a low frequency signal. The towers can broadcast huge coverage areas with the low frequency at the cost lower speed than their band 4 coverage areas. Band 12 for is great at penetrating buildings with thick walls.

Very few phones support this freq on T-mobile and I was hoping the mini could do it.

 

[marvelljones]

Can anyone verify this actually works? Got this phone with the intention of having better coverage from band 12, but i've never seen lte discovery show anything but band 4.

I'm on the stock rom w/ magisk, anyone have advice?

Are you testing it in the same place(s) you've had other phones show band 12 on LTE discovery? Officially it should work as of the Jan 2017 update. I'm pretty sure I have had it show band 12 when I was on stock (not rooted). I don't have a way to verify this now as my Mini is on LOS which currently does not support band 12 nor Wi-Fi calling. It's also my "secondary" phone until I get time to return it to stock (or LOS gets that functionality).

Sent from my Robin using XDA Labs

 

[William Guo]

@googletermsofservice,

Thank you very much! Are there many service provider offer band 12 now? I mean, many providers such T-Mobile, ATT etc all offer band 12?

 

[mx597turbo]

Can anyone verify this actually works? Got this phone with the intention of having better coverage from band 12, but i've never seen lte discovery show anything but band 4.

I'm on the stock rom w/ magisk, anyone have advice?

Does your phone stay on LTE when making a call (VOLTE)? If yes, the phone is working on band 12.
According to these website, the A7M should work with Band 12 and VOLTE & WFC:
https://www.androidpolice.com/2017/...ini-t-mobile-volte-december-security-patches/
http://www.spectrumgateway.com/compatible-phones
You need to make sure your phone is on at least the Dec update, if not newer.

Spectrum gateway is pretty reliable. I would use them as a first resource when considering a non-Tmo phone. I am supposed to receive this phone tomorrow. Will update if B12/VOLTE/WFC works...

 

[mx597turbo]

I got the phone today. I can confirm that both VOLTE and WiFi calling work on TMobile after installing the update from the ZTE website here: https://www.zteusa.com/axon-7mini#support