Support for the Pixel 4 and Pixel 4 XL is currently less mature, but those along - with the upcoming Pixel 4a will become the recommended devices due to longer support - and incremental security improvements for the device support code and firmware. On the - Pixel 4 and 4 XL, support for fingerprint unlock as a secondary unlock mechanism has - been removed and replaced with IR-based 3D facial scanning. GrapheneOS plans to extend - secondary unlock support with the option of 2-factor authentication using a secondary - PIN or passphrase required for fingerprint / face unlock. It's likely this will be - implemented first for fingerprint unlock, so that's another consideration. The Pixel - 4a will likely have a fingerprint scanner instead of the dual infrared face scanning - cameras.
+ with the Pixel 4a (once it's supported) will become the recommended devices due to + longer support and incremental security improvements for the device support code and + firmware. On the Pixel 4 and 4 XL, support for fingerprint unlock as a secondary + unlock mechanism has been removed and replaced with IR-based 3D facial scanning. + GrapheneOS plans to extend secondary unlock support with the option of 2-factor + authentication using a secondary PIN or passphrase required for fingerprint / face + unlock. It's likely this will be implemented first for fingerprint unlock, so that's + another consideration. The Pixel 4a has a fingerprint scanner instead of the dual + infrared face scanning cameras, so it would share the same implementation as the past + generation devices.