Does iphone5s fingerprint scanner support 10 finger prints?
I found a way for saving 10 fingerprints into my iphone5s.
This might be possible, as the iPhone User Guide mentions, that you can add multiple fingerprints and does not say anything about a limited number.
Set up the Touch ID sensor. Go to Settings > Touch ID & Passcode. Set whether you want to use a fingerprint to unlock iPhone, and to make purchases. Tap Add a Fingerprint, then follow the onscreen instructions. You can add multiple fingerprints (both of your thumbs and forefingers, for example, and one for your spouse).
copied from iPhone User Guide, Touch ID