According to the instructions on the Developer Preview page <https://developer.android.com/preview/features/direct-boot.html#testing>, I should be able to enable Direct Boot by going to Settings -> Developer options -> Convert to file encryption. However, on my Nexus 6 (freshly wiped and manually re-flashed) this option does not show up there at all. The phone is encrypted, Screen lock is set to "PIN", and Secure start-up is enabled.
I tried using the second method as well: I rebooted to bootloader and tried using command fastboot --wipe-and-use-fbe This returns an error "fastboot: unknown option -- wipe-and-use-fbe" I am running the preview versions of Android SDK Tools (v25.1.1 rc1) and Platform-tools (v24 rc1). Am I missing something? Is this feature even available in Preview 1 and/or Nexus 6? -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/android-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/android-developers/38b040c4-a0de-4a31-8908-40603aa15596%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

