Can I use an unlocked Canadian S9+ with all US carriers?
I just got my S9+ the other day and am starting to learn about GSM and CDMA. Apparently Sprint and Verizon use CDMA while AT&T and TMobile use GSM. I also heard that GSM is now the global standard. So I am guessing that all Canadian networks use GSM? Also would my phone work with a Sprint or Verizon sim card?