After death, fingerprints cannot unlock mobile phones. At present, most fingerprint unlocked smart phones are identified by RF capacitive sensors, that is, they can only be unlocked when the fingers of living people, skin cells of fingers and blood flow are normal. After death, the changes of the corpse are also different. The corpse begins to stiffen in 3 hours at normal temperature, and the whole body becomes cool in 12 hours, Fingertips belong to nerve endings, and there will be no blood circulation first, so it is generally impossible to unlock the fingerprint lock after 3 to 5 hours
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