ronw: No I am with Telecom and I just took the old card in and they swapped it. I imagine Vodafone well do the same as well and as far as I know they are these only two mobile operators offsetting 4Gpeejayw: Umm,no. Damn,do I have to buy a new sim now?
All of Vodafone's SIMs should work just fine with 4G as long as a 4G plan is on them. The need to replace SIMs specifically for 4G is a Telecom-only thing, due to the way they implemented their 4G upgrade.
Vodafone stores will, of course, swap you out to a different-sized SIM free of charge if you're a current customer. :)