Currently coming to the end of a Virgin VIP mobile package. Unlimited calls, texts and data about £25 per month. Have to upgrade apparently. Use quite a lot of data. Like my present handset. (a) Can I retain the handset and go for a SIM only deal? (b) Do Virgin do this? (c)How does it work? (d) Will I just be sent a new SIM card for insertion into my phone? This mobile ludite would be very appreciative of any advice available.