noyb has really done amazing work the last many years. They specialize especially in GDPR law and Schrems II (Max Schrems is the founder).

EDRi is another organisation doing a lot of good work in digital rights. They fight against chat control and such which is an area noyb is not so active.

These are the best EU based organisations to support imo. EFF does good work too, but a lot of that outside EU.

Fair, I was not aware of that exception. It does seem to cover this case, assuming Google is actually not sending any data outside of the phone, use it for further training etc.

The person owning the phone where the processing takes place, is the processor of the data in this case. That still requires consent from the data subject per gdpr.

In many places call recording (or indeed processing of personal information which is highly likely to be present in phone calls) requires consent to be legal. I highly doubt this kind of processing is legal in the EU without both parties consenting.