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Don’t ever hand your phone to the cops
(www.theverge.com)
This is a most excellent place for technology news and articles.
input the wrong password like 5 times to lock up the phone then say its muscle memory and you don't remember the password numbers
iPhone tip to require password to open:
or
(Edit: ahh, this tip’s been given several times now, only new info is that either volume down or volume up or both will work)