Locked vs. Unlocked Phones: What’s the Difference?

Locked vs. Unlocked Phones: What’s the Difference? – By Amato Cole How-To Geek
Shopping for a new phone can be overwhelming, especially when you see terms like “locked” and “unlocked.” While these may sound like something to do with security, they actually indicate whether you can use the phone with the carrier of your choice. Let’s look at both of these definitions in detail.