Hot answers tagged security
According to this changelog the upcoming f-droid version 0.71 should support this. Another mention of this is in: https://github.com/WhisperSystems/TextSecure/issues/127#issuecomment-51065857
If you run xposed framework, NFC LockScreenOff Enabler is your method of choice.
You can check if your phone is currently unlocked/rooted in bootloader (volume down+power for a few seconds when phone is off should do it. Otherwise Google for your phone.) I guess there's no way to check if your device was ever rooted. Indeed, the safest* is to root the phone yourself and flash a ROM. Another advantage of this is that you are up-to-date. ...
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