Since it is an LTE device, I would think it is already SIM unlocked.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
I have the same problem, even though it was sold to me as "unlocked" when i put a Telstra 4g sim (Australia) it does not even recognize the sim, it gives me the screen above. Any suggestions will be greatly appreciated.