3G frequency bands required for Tmobile

[AC Question]

I have a 3G GSM modem for sierra wireless. It supports 850/900/1800/1900 GSM/EDGE frequency bands and UMTS B1/B2/B5/B6/B8 frequency bands. Will I be able to get a 3G signal on my modem in USA (primarily all boroughs of new york city) and be able to upload and download data despite not having the B4 frequency band ?

I believe B1 is 2100, B2 is 1900 , B3 is 1800, B4 is 1700, B5 is 850, B6 is 800, B7 is 2600 and B8 is 900.