Samsung Galaxy S4 Unlocked 16GB (S&D)

do these phones work with Sprint or which service are they unlocked for?

no LTE specs?

looking up M919 gets me which says T-Mobile and “LTE: Bands 1/2/4/5/7/17; HSPA+/UMTS: 850/AWS/1900/2100MHz; GSM: 850/900/1800/1900MHz”

LTE cheat sheet:

Highly recommend any buyers immediately check their purchases from this deal. I bought an S4 from a similar Woot deal a couple months ago and didn’t find out until well past the 21-day return policy period that it wasn’t unlocked. It turn out that it was, in fact, still in a contract.