Change Credit Card on File
To change the credit card you use to pay for your phone system, click this link and add the new card details:
https://www.allclients.com/MyAccountCredit.aspx
This is the information you will need to enter:
This updates the card you use for your AllClients billing. You do also have a Twilio.com account that does bill your card, you will want to also update that account with your new billing details.