Just as the SIM card from your AT&T or T-Mobile USB internet stick works in a smarpthone to bring it to life with data, the SIM card that comes in all Verizon 4G laptop accessories (like the Pantech UML290, which is what we use when we’re on the road) will work in any Verizon LTE smartphone. Now, since Verizon LTE phones come with a SIM card when you buy one that is attached to your phone’s data plan, this won’t matter to most people. But for the super-heavy data users that want to spread their 4G data usage over multiple data accounts, you have the flexibility to do so.