The A3 e-tron has an option to insert a SIM card to run the Audi Connect on-line services. You can also create a wifi bubble in the car apparently. I plan to use my actual phone for calls (via the Bluetooth) and was wondering if anyone has any tips as to what the best SIM card is in terms of cost per mb. I would be interested in the UK, but I think this forum has some European wide attention as well.