Welcome to the AC Forums....So the T-Mo version list these bands.. What carrier are you on? and we can compare bands.
Network
2G/3G/4G/LTE Capable
GSM (850, 900, 1800, 1900), UMTS (Bands I,II, IV, V, VIII)
4G LTE (Bands 2, 4, 17)
and the Developer version...
Networks
GSM/GPRS/EDGE - UMTS/HSPA + up to 42 Mbps - 4G LTE
2G/2.5G GSM/GPRS/EDGE bands
850/900/1800/1900 MHz
3G UMTS bands
850/900/ AWS/1900/2100 MHz with HSPA+ up to 42 Mbps (B5/B8/B4/B2/B1)
4G LTE bands
700/AWS/1900MHz (B17/B4/B2)
So the 2 versions look the same. The CDMA version for Verizon has the extra cdma bands. (Avoid

)