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Suspects can refuse to provide phone passcodes to police, court rules
(arstechnica.com)
This is a most excellent place for technology news and articles.
Or squeeze volume up button and power button. Encrypts your data and requires passcode unlock. Also, set a long passcode like 10 digits. 4 can be cracked in minutes. 6 can be cracked in a few hours.
Don’t hold them down for too long though or it automatically calls the emergency services!