1.
Access the Phonebox website or app.
2.
Sign in.
3.
Once you navigate to the main page, the extension section will be displayed. Alternatively, you can also directly navigate to the profile menu.
4.
Click on <Add your Card>
5.
Enter the credit card holder's name, number, expiration date, and CVV.
6.
By clicking on <Save>, from the next time onwards, service fees will be automatically deducted from the newly registered credit card.
