How to change the repayment date of credit card by SMS?

First of all, I haven't heard that SMS can do banking (because banks can't verify your identity). In addition, not all banks and all card types support changing the repayment date, and most banks do not. Finally, if you want to handle some banking business, I suggest you open a mobile banking and download a client, which can handle account information, repayment, transfer, payment, appointment and so on.