now is got issue with amex, none of the amex can be added. no issue with mastercard and visa.

I got the mastercard added into iwatch wallet now.

observed that mastercard from sandbox can be added with activating status. the card is activated after one day activating.

also unable to add sandbox mastercard to iwatch wallet, no issue for amex. slightly difficult and failed but in the end managed to add visa after several manual input sandbox test card. Please take a look at 23315137