We went to UTS store to find a SIM card for a Samsung Galaxy S4 and were told it had to be a Samsung 5 or higher to effectively use a SIM card.
I am by no means a smart phone expert but my Samsung Galaxy J2 Core works just fine on SXM. I bought the phone March 2019 at Boolchands and got the SIM card at the UTS store in Philipsburg, it worked just fine in Nov. 2019 also.
