950XL no T-Mobile LTE?

So, you have seen actual data on band 12 ?

I've got 4 phones here--the other three are pulling band 12 right now, but the 950 xl is not.

Yes. I verified the band with your suggestion...frequency showed as 5035 which translates to band 12. I did a speedtest.net run with wifi off to verify is was actually functional.
 
i would love to test out if LTE works. but i cant even get the damn phone. it arrived in hawaii 7 am saturday. scheduled delivery monday, never came. they rescheduled for tuesday. still not here. after weeks of trying to order i am not freakin stuck just waiting for ups to deliver the stupid thing and its been on the same island as me for 4 days now. freakin thing is like 30 minutes away. work schedule wont let me go and pick it up myself. motherfreakin 30 minutes away and taking more than 2days to deliver
 
I live in South Florida on T-mobile, and after following the steps above, I get 1 earfcn is 5035, which translates to band 12.

Network Type LTE (FDD)
E/U/ARFCN 5035
Band Name Lower SMH blocks A/B/C
Uplink Frequency
(phone to base station) 701.5 MHz
Downlink Frequency
(base station to phone) 731.5 MHz
Band Number 12
 
i would love to test out if LTE works. but i cant even get the damn phone. it arrived in hawaii 7 am saturday. scheduled delivery monday, never came. they rescheduled for tuesday. still not here. after weeks of trying to order i am not freakin stuck just waiting for ups to deliver the stupid thing and its been on the same island as me for 4 days now. freakin thing is like 30 minutes away. work schedule wont let me go and pick it up myself. motherfreakin 30 minutes away and taking more than 2days to deliver

Shoots Brah!
 
I have the 950XL dual sim on T-MO in Houston Texas and I get 39Mbps on LTE and it is the best phone I have owned.

Pedigree: Moto MPX 200 - iPhone - iPhone 4S - Nexus 5 - Lumia 640 LTE to the king Lumia 950XL Dual sim
 
I had one and got LTE, data was just as fast as on my tmobile iPhone 6s Plus, I returned it because of apps I needed, that were not available.