i switched the sim in my bionic and my nexus 3 times each. it made no difference for me. worth a try though, since it's free (don't let them try to charge you)
I also switched SIM cards in my GN before getting a replacement device and the SIM card didn't do a thing to help the problem.
I don't know a lot about SIM cards but can't understand how a SIM card (which just holds your authentication information) would affect signal strength but Verizon sure likes to use it as a troubleshooting technique.
