What is a SIM Card and Why do You Need One to Accept Payments? Did you know that Subscriber Identity Module (SIM) Cards are used for more than just smartphones? SIM Cards can be inserted into any point of sale device, from mobile point of sale, countertop sales terminals, even vending machines and parking meters. ...What is a SIM Card and Why do You Need One to Accept Payments? Read More »The post What is a SIM Card and Why do You Need One to Accept Payments? appeared first on .