Sure, but I would be extremely careful doing it as it is easy to spoof a number and could possibly open some other issues.<p>You would also need to have the user create their account and enter payment info via a website first. After that though, you just create a webhook through a service like Twilio to respond to a set of texts and when the Make Payment text is received it processes the charge. You could require a pin or something form of verification to help ensure it is the actual user and not their kid accidentally playing on the phone.<p>You wouldn't be directly associating the credit card to the phone number though. You would simply be associating the phone number to a user in your system, and then the user would have a payment method associated with them through your processor (i.e. Stripe) in the form of a token.<p>And just to be clear I would never use this to require the user to text a credit card number to your company.