Option 1

https://grapheneos.org/install/web

1. Settings > About phone/tablet and repeatedly pressing the Build number menu entry until developer mode is enabled.

2. Settings > System > Developer options and toggle on the OEM unlocking setting
3. apt install android-sdk-platform-tools-common -y
su -

apt install android-sdk-platform-tools-common -y

4. systemctl stop fwupd.service

PHone and Web Browser

5. Post reboot > Lock Bootloader 

[ Follow Directions ]

Option 2 Commandline 


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On Grapheneos 

Install on Sandboxed Environment
[App Store] >  
- [Android Auto]
- [Google Play Store]
- [Google Play Service] 
- [Markup]
- [Accrescent]

[Accrescent] >
- [Andbible]