Generally speaking, mobile phone pos machines can swipe their own credit cards, but it also depends on the purpose. Some mobile phone pos machines do not support tx, such as Lacarra pos machines, and they can only swipe their own credit cards for some payment operations. Of course, there are also some pos that can swipe their credit cards tx, such as money bags. The rate is not high, 0.5% rate, t+0, T+ 1 optional. However, I don't recommend using my own mobile phone pos machine tx, because it will affect the credit of credit cards and may be locked by banks. But if the operation is proper, such as rescue at ordinary times, it can still be used.