A cellphone carrier is a company that provides service and connectivity for your cellphone. They allow you to make calls, send texts, use data, and access the internet on your phone. Full definition
An example of this maybe your local utilities companies or even cellphone carriers. (best.creditcard)
Each ID corresponds to a certain Japanese cellphone carrier. (namakoteam.com)
The largest cellphone carrier in the U.S. added 941,000 devices to its contract - based plans in the April to June period, exceeding analyst estimates and continuing a strong run. (canadianbusiness.com)