Hello, I would need your support in making a decision. The topic has already been touched in a thread, but I’m somehow not really further yet. So: my V70 has the factory phone installed, and from my old car I also have a Bluetooth-FSE (AudioBlue from FWD) “to lie around”. Advantages for the BT-FSE: – Comfort (enter and go) – Compatible also for my wife’s mobile phone and not first SIM-card-change – constantly up-to-date phonebookeintr ie advantages for the built-in telephone: – no screwing necessary – control on the steering wheel and display in the instrument cluster – use of factory micro and speaker in headrest – use of external antenna I asked my GSM provider – the TwinCard costs 3EUR per month extra and I must always prioritize one of them (if both devices are booked) by code input. Sounds annoying, therefore my questions: – if I enter and turn on the car phone and this it then prioritizes, can I “only” call with the car GSM, right? – if I get off and the car GSM switches off automatically (?) – do I still have to enter the Prio code on the mobile phone? – do the two SIM cards have different PINs? – Phone book synchronization between the SIMs – is this done by manual copying in the mobile phone or is there an “online” service with the operators? It would be great if you could tell your opinions and experiences. I admit that that is a luxury problem. 😉 Basically I find the BT-FSE better, but somehow it strives to operate the installation effort, if already a phone is built in. Thanks and greetings from the Rhineland Bernd :-))