Today, fingerprint scanners are on almost every phone. Having a fingerprint sensor to unlock your device is very handy. By the time you pull a phone from your pocket and raise it to your eyes, it is already unlocked. It also prevents someone from snooping on your password or pattern over your shoulder or through a security camera.
But it can fail to hide your sensitive chats and photos from sneaky roommates or nosy family members. They can easily use your finger to unlock your phone while you are asleep or too high.
So, How Do You Prevent This?
Simply force the phone to ask for the PIN when needed. One easy way is to restart your phone before sleeping because, after restarting, it asks for a PIN and will not accept your fingerprint for the first unlock.
But it isn’t easy to restart your phone every time and resist unlocking it afterward. There is another way: lock it through a device administrator. In other words, use an app with device-administration rights to lock your phone.
One such simple app is Screenlock. You just need to tap it before going to sleep.
I hope the article helps. Keep your private chats private.