I get that to from time to time. Usually if you toggle your data off and on (or airplane mode) it will come back. I believe its just a bug that hopefully will be fixed in the next update.
I get it a lot! I took it back and they gave me a new sim card and that didn't work. They gave me a whole new phone the next day and I still have that problem. I'm really getting irritated with Verizon as I have learned that this happens on a lot of their phones. Getting ready to cancel contract and go to sprint