Kevin_Perez_Xochihua Said:
"I cant use my card on my iphone it always says failed on the bottom of card info and it gets denied when i try to purchase something online"
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Use WiFi:
Try using WiFi, rather than Cellular. It would be seen as a more trustworthy method of adding it, and your bank would be less skeptical, thus more likely to allow the transaction to go through.
Also, refer to the link provided atop this post.