I bought an Adapter off eBay for like $1.17 including shipping so I can swap between my Galaxy Nexus and ThunderBolt. Why would I want to use my ThunderBolt? I don't know. I guess it's good knowing I have a backup phone if I break my Galaxy Nexus and I don't have to go to Verizon to get a new SIM.
So, for a 4G device on Verizon, do you just move the SIM to a new device to change to it, or do you still have to use the web interface to switch the device like we did for 3G devices?
I haven't tried it but I think you can just swap SIMs. On their website, if you activate a 4G phone, you will then be prompted to enter the SIM card number. But in theory, you should be able to swap. I'm picking up a Maxx today, so I'll swap my Nexus SIM with that and see what happens.
Here's a link from the CrackBerry site for those asking about putting a micro SIM card in a standard SIM slot: