If your AMEX card is a US-issued AMEX card but you are using an international phone number, it will not show up in your funding options. To see the AMEX option, please follow these steps:
- Open your Abra app, the portfolio view
- Tap: the icon on the upper left corner to go to the menu
- Tap: 'Profile’
- Tap: ‘Edit’
- Change your phone number to your US phone number
Restart the app and you should now see the AMEX option.
For additional questions regarding AMEX cards, here's a resource that can help.