The Touch ID fingerprint reader on the iPhone and iPad is a great security feature. Except when it doesn’t work.
To make it work better, you’ll want to train the same finger several times as though it’s different fingers.
Just go into your device’s Settings menu and select Touch ID & Passcode. Use the Add a Fingerprint option three or four times, but use the same finger each time. Now iOS will know every millimeter of that print and you should get fewer “try again” errors when attempting to unlock your phone with it.
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