3GPP

3GPP stands for "3rd Generation Partnership Project". It is an organization that sets standards for mobile phones and other mobile devices, like tablets and laptops. They create rules and guidelines that all mobile companies and device manufacturers need to follow in order to make sure that different types of devices can communicate with each other. For example, 3GPP sets standards so that a phone made by one company can make calls to another phone made by a different company. This way, no matter what phone you use, you can call your friends and family.