Hello Mgleboff,
As far as I am aware, these are the band/frequency specifications for that version of the iPhone SE:
Model A1662*
LTE (Bands 1, 2, 3, 4, 5, 8, 12, 13, 17, 18, 19, 20, 25, 26, 29)
CDMA EV‑DO Rev. A (800, 1700/2100, 1900, 2100 MHz)
UMTS/HSPA+/DC‑HSDPA (850, 900, 1700/2100, 1900, 2100 MHz)
GSM/EDGE (850, 900, 1800, 1900 MHz)
~ taken from here.
Judging by those specifications, that version has all of the compatible bands/frequencies for 2G and '3G'. With regards to LTE, that phone has three compatible bands/frequencies. You can verify the compatible bands/frequencies here. While the phone should work on the LTE network, coverage depends on corresponding bands/frequencies on your surrounding cellular towers as not all towers use all bands/frequencies. You can get an idea of your area towers here.
Hope this helps 
Cheers
