This is actually one kind of fraud that could easily be solved if not for draconian app sandboxing rules. If your banking app could easily see if you're in a c

This is actually one kind of fraud that could easily be solved if not for draconian app sandboxing rules. If your banking app could easily see if you're in a call and who you are calling / who is calling you, this would be a lot easier. Even without that info, banks could solve this by requiring all customers to initiate all calls from the app. In case a customer lost their mobile device, they'd let them proceed on the phone, but send a bunch of alerts to the device that it was just reported stolen and to immediately hang up if you were still the owner.