Stock Android Guide

There are serveral ways to harden your stock android. First uninstall bloatware using this video: https://www.youtube.com/watch?v=YYMY5dOPV1g

Then harden your settings and make sure you follow the new oil and privacyguides apps and settings to follow. Techlore may have some guides aswell.

Conclusion:

For more better privacy, Just use GrapheneOS!