hi #permacomputers, #hackers, #bricoleurs

Starting to tinker with old/disused smartphones to self-host. However, upon buying a couple second-hand phones, I'm often faced with Google's FRP protection: you can only use the phone by connecting to the previous owner's google account. Factory reset doesn't solve this.
Do you have any trustworthy resources on bypassing this? terminal tools? forums?
Seems essentials to increase phone's lifespan.

thankssss