I updated my iPhone’s software yesterday but only noticed a bug several hours later (when my apps needed to be updated), a bug affecting the credit/debit card saved in my App Store. It’s a card I’ve successfully used for almost a year for app and in-app purchases. Why wouldn’t it work now? It wasn’t a coincidence I noticed this bug a day after my iPhone’s iOS 9.3 update.
Just now I tried adding other credit/debit cards in my possession but I still see the error message “Card declined…” appear. Was worried a bit there it was a card problem but clearly the bug was caused by this new software update.
Subsequently, the following pending updates will accumulate and have to wait a while until this iOS 9.3 software bug is fixed.