How it works In order to use this facility, you must have a smartphone or a tablet with access to internet. Transactions are very simple. You just enter transaction details in the mpos paycenter that you have installed to your smartphone or tablet. Then you place the customer’s card on the card reader. The transactions executed either contactless, or by placing the card into the device and read the magnetic chip. Validation is occurred by entering the customer’s pin The mPos operates on the android and ios platforms.