Touch ID not functioning
I have just bought an Iphone 5S but the ID Touch Security isn't working. I can install my fingerprint fine but it never ever asks me for it. I have Touch ID Security set to on. Why won't it work? Passcode works fine. But if I turn the passcode off then the phone is unlocked without any further security. Could this be a software problem with my new phone? Again its NOT a problem with my fingerprint being recognised. But a problem that the phone doesn't ask me for my fingerprint when I unlock my phone, despite me making sure the featrue is activated in settings.
Please can someone help. Its really frustrating getting a new phone and it not doing what I paid good money for it to do. Thanks.
iPhone 5s, iOS 7.0.6