If a phone is compatible with 700MHz, will it work on T-Mobile's Band 12? topic

As the title suggests, if a phone is listed as FDD-LTE 700MHz compatible, would that imply it'll work on T-Mobile's 700MHz Band 12? I am often confused with this band as it seems there's various other bands within the 700MHz frequency. So there's no positive way of knowing if it supports the band 12. For instance, I've been looking to find a cheap alternative phone (from China mainly) that might have support of LTE 700MHz so I can take advantage of T-Mobile's latest band, but I'm not sure on if it'd work. Couple examples of some phones are here:

http://www.aliexpress.com/item/Origi...323996202.html

http://www.aliexpress.com/item/Origi...297288429.html

http://www.aliexpress.com/item/Origi...043526871.html

That's just 3 out of a list of them found on Aliexpress. They all say FDD-LTE 700MHz. My gut is telling me the 700MHz it lists is for some frequency that China uses and wouldn't make a difference if used in the US. Just needed some helpful clarification. Thanks.

xda-developers