You are not always as safe as you think you are. Citibank revealed that it’s U.S. iPhone app accidentally saved personal information including account numbers. At least the company did the right thing and owned up to this security flaw.
In fact, they have already rolled out an updated iPhone app that patches the problems. According to Citibank, this flaw only affected users of their mobile banking app. Credit card customers who use Citibank’s services via a separate iPhone application were believed to be safe.