CNET’s Maggie Reardon points out that Verizon is, once again, selling locked phones just like its competitors. And that means that a phone you buy from one carrier might not work on another carrier’s network. But, as she points out, you can still purchase unlocked phones that can usually be easily switched between carriers or used overseas by purchasing a local SIM card. Still, there are exceptions, which is why it’s important to read her post before buying any unlocked phone.