My phone is a Pixel 8A Graphene OS Phone. I Want to make this phone a Hardended phone. A safe phone. Privacy friendly phone. Not a Watched or tapped into phone. Basically limit the spying and intercepting and get control of the spying mechanisms that may be at play.
The phone has Sandboxed google.play services.
(grapheneos) and 1 profile (owner)
The phone has a kyc sim card. ( currently no way out)
Put the phone in airplane mode. Only turn off airplane mode when you want to check your voicemail or make a call. This will stop all celltower tracking which is the only type of tracking GrapheneOS can't do anything about.
I'm using VoIP with my phone in airplane mode. Calls come in over wifi if the phone is connected and the voip app is active. When I'm not connected, calls are sent to voicemail (in my case are sent to my email account as an mp3 attachment)
My voip provider is very kyc. I'm thinking of switching to JMPChat.