I use the Samsung Galaxy Proclaim and yes it's on verizon towers.
For more information on what is included in a carrier settings update, contact your carrier.
When a carrier setting update is available, you will be prompted to install it.
If it has a "C" in the model number it's verizon or if it's an android it will have a RED verizon map. You are wrong when you say Verizon does not use sim cards because I have a sim card in the phone I use right now.
I don't know where you got your info but every Verizon phone I have had used a sim card.
Whatever the true problem and its source, Apple has issued an official fix.