Young mathematicians dive into the number line to discover decimals and how the numbers infinitely get smaller in between. They click the zoom button a few times and learn that the number line doesn't just stop at integers. Includes a...
But maybe you're not sure exactly what that means. An unlocked cell phone is one that is not tied into a certain carrier's network: It will work with more than one service provider. Most cell phones and smartphones are tiedâor lockedâto a certain cellular carrier, such as Verizon Wireless, T-Mobile, AT&T, or Sprint.
An unlocked cell phone is a device that can be used on any carrier that supports that phone. A locked cell phone, in contrast, is fixed to a single carrier. The lock is simply software on the cell phone that prevents the device from recognizing a SIM (Subscriber Identity Module) card from a new carrier.