Mobile POS payment system is the most convenient way for merchants to accept credit or debit card payments. To apply for a traditional mobile POS is not easy, as the requirements of banks are quite high, cost a lot of time and money to wait. With increasing smartphone adoption, mPOS are alternative mobile POS solutions, consisting of mobile devices and UniMate Readers.UniMate Readers are mobile payment add-on devices that can transfer mobile devices to a POS by allowing them to accept payments. Unlike the other magnetic strip readers, sensitive cardholder data is always protected at the entry point. During the data transition process, all data can be signed by the digital certificate stored in readers to guarantee the payment security.