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Here’s how Verified Boot warnings look in Android 6.0 Marshmallow
August 23, 2025
Verified Bootwas introduced way back inAndroid 4.4 KitKat. The feature was designed to detect persistent rootkits that could stick around longer than anticipated and potentially compromise a device’s security. Although many folks originallyraised their concernsthat Verified Boot could diminish Android’s modding community, this didn’t really seem to be much of a problem in previous versions of Android.
When it comes toAndroid 6.0 Marshmallow, though, it’s clear that Google is taking Verified Boot a bit more seriously than in the past.Ars Technica’sRon Amadeoposted a photo yesterday on Google+ that shows off what happens when you unlock the bootloader on either theNexus 5XorNexus 6P. The screen shown below appears before the Google logo when the phone is starting up.
The link listed under the warning message brings you toa support page, explaining what the different warning messages mean. From the Nexus support page:
Google says that each message should dismiss automatically after 10 seconds, and your device should then continue starting up. If the warning message doesn’t go away, you can press the power button once to continue starting up your device. If you don’t want to start up your device after seeing this warning message, Google recommends turning off the device and contacting your device’s manufacturer for help restoring the original OS.
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