If it is either E6603, E6653 models it should work fine for LTE or 2G but not HSPA+ 3G/4G. It shows LTE Band 2,4 and 12 which are T-Mobile's LTE bands. For HSPA+ T-Mobile primarily uses 1700/2100 which this phone doesn't look like it has.
Technology GSM / HSPA / LTE 2G bands GSM 850 / 900 / 1800 / 1900 3G bands HSDPA 850 / 900 / 1900 / 2100 - E6603, E6653 4G bands LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 20(800), 28(700), 38(2600), 40(2300) - E6603, E6653
i got the E6853 Model :
UMTS HSPA+ 850 (Band V), 900 (Band VIII), 1900 (Band II), 2100 (Band I) MHz
GSM GPRS/EDGE 850, 900, 1800, 1900 MHz
LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 38, 40
you think ill have a lot of trouble with this phone ? stevetjr
I see some similarities in the technologies but then again, I'm new to reading these codes i appreciate your information.
As with any non T-Mobile phone you won't have some of the special tweaks
that T-Mobile has the manufacturers build in like Gogo texting, WiFi
calling can be hit or miss.
Now T-Mobile has had a Sony phone (Z3) that supported Band 12 and VoLTE so
Sony already had done that.
As far as supported frequencies as mentioned this phone supports all of
T-Mobile's current LTE bands. Issue would be if you hit an area without LTE
you will drop all the way down to 2G so basic data (slow) and calling.
T-Mobile has pretty good LTE coverage now so probably wouldn't have to much
of an issue but just know it's there when it does happen.