This is assuming you have the time to do so. In the shock and awe practices of law enforcement in the states, no-knock-warrants by SWAT teams at 3am in the morn

This is assuming you have the time to do so. In the shock and awe practices of law enforcement in the states, no-knock-warrants by SWAT teams at 3am in the morning aren't an unheard of thing. Do you honestly think, in that precise moment, you'll remember to run and grab your phone and implement the lockdown mode before they breach into the premises? I'd say it's better security practice to only use a passcode and, if you must use any biometrics, use an obscure finger (like the side of your pinky finger or something) - whilst also enabling the the auto-wipe feature after 10 failed login attempts. IANAL but from what I understand of the current goings on in the states, the police have to tell you which digit to try. Just as a password is protected, knowledge of which digit and how it should be placed is also - technically - protected. Think of it like two-factor authentication: The fingerprint is what you are, which was can be used to unlock the phone, but divulging the "which finger and how it should be placed" is what you know. I can't seem to find it but people were "hacking" the biometrics of Androids with 3D printed heads. The trade-off of convenience for security isn't really worth it. Again, IANAL, and IMHO, and - if you care about privacy - you shouldn't use biometrics whatsoever but I understand the trade-offs between convenience and security and why so many people fall into that trap.