Published October 6, 2026
Last reviewed October 6, 2026.
The rule: get a warrant
In Riley v. California (2014), the Supreme Court ruled unanimously that police generally need a warrant to search the digital contents of a cell phone, even after an arrest. The Court said phones hold "the privacies of life," far more than anything in a wallet or pocket.
Exceptions
- Consent. If you agree, police can search. You can say, "I do not consent to a search of my phone."
- True emergencies (exigent circumstances), such as an imminent threat. These are narrow.
- Border searches follow different, looser rules at international borders and airports.
Taking your phone vs. searching it
Police may sometimes seize a phone while they seek a warrant, for example if they believe it holds evidence of a crime. Seizing it is not the same as being allowed to look through it.
Practical tips
- Use a strong passcode. Some courts treat a forced fingerprint or face unlock differently from a passcode.
- Turn on automatic cloud backup so videos survive if a phone is taken.
- If you are recording police, a livestream or auto-upload app protects your footage.
- Do not physically resist if an officer takes your phone. Say you do not consent, and challenge it later.
CopFax is not a law firm and this is not legal advice.