Anyone done this? At present I'm having to carry around 3 (GSM) phones dues to work and personal phones. I'd like to copy these sims to one sim card and swich between them with a menu on the phone.

Now theres stuff on eBay that will do this, bit it only works with certain sims (old ones). Is there anything out there that will scan modern ones?

Edit: I don't want a twin sim cover - they are bulky!