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£9.99/mth for free Spotify (car only, you can’t bring it to your phone/other devices), live traffic in navigation, satellite view, Tesla Theater / web browser through the car’s 4G, Sentry cameras live view from the Tesla App
Premium connectivity is more a nice to have. The sat nav still gets traffic info for routing, you just don’t see traffic info on the map. You also only get speed camera info with premium (and when the sat nav is navigating you which seems like an odd restriction).