Why install the separate dialer? If youre already using graphene or a degoogled os wouldnt this introduce more attack vectors?
Or am i overthinking this and your writing about stock android phones
15 minutes.
That’s all it takes to ditch the spyware, the noise, the profile trail.
Burn the old skin. Rebuild on your terms.
Own your phone or it owns you.
https://untraceabledigitaldissident.com/erase-your-phone-footprint-in-15-minutes/
Discussion
Graphene has a clean dialer. If you are using android maybe considering not using the stock Google one that automatically syncs to your Google account