The prices of a SIM card can vary from place to place. I found them from around $18 to as high as $30 and all included some time. UTS had the lowest price on the SIM card and some of the smaller groceries were about the same price ($18-$20). Tech Hub is very helpful and knowledgeable and was one of the few places that had a working "Topup Card" machine in the past, although I found more of the machines available in March. If you can find a "Topup Card" you can remotely add funds to your phone and keep the number active. You put funds on the card and transfer to your phone. The SIM/number used to be good for 60 days (as is mine) and all you had to do was add $1 every 58 days or so and your SIM and number are good to go.