How to change the billing details for phone subscription?
To change the billing details for a phone subscription:
Step 1: Go to Settings.
Step2: Click on Phone Settings.
Step 3: Click on the Credit Balance tab.
Step 5: Select a number for which you wish to change billing details.
Step 6: Select Credit Balance Settings.
Step 7: In the Billing Details section, you can click on the Edit icon to change the card details.
Step 8: Click on Save Settings.