hi guys, I have a question relating to Touch ID. I had my iPhone 6S replaced yesterday by Apple due to a fault in it. Anyway - I restored from iCloud but I noted that apps that used Touch ID earlier, like Amazon and PayPal, don't now. They require a password. This is even if I log on numerous times (not just the first time). I also then noted that when I switched from a 6 to a 6S this happened to the Amex app. Is there a way to fix this? I went to settings and it only shows that I can use Touch ID to unlock, Apple Pay and iTunes / App Store. When I go to the settings in the app it doesn't affect it either. Thanks in advance!