[Vultra]

Old school moron here, but some scotch tape and a coffee mug, or some other object, may be able to get you a finger print.

This does work, but It's not always the case.

Some manufacturers use "anti-spoofing" fingerprint techniques, such as looking for perspiration. This helps Identify a real finger and not your above-mentioned entities. Having said that, most don't use anti-spoofing, hence you can unlock a phone as follows.

* Fingerprint on masking tape.
* Fingerprint on silicon gel (mould).
* Photocopy of a fingerprint.
* Finger of a "corpse".

All these have been tried, tested and succeeded. Remember, It's matching  a "partial" stored Image, not the full finger fingerprint.

Would love to try the masking tape method.