A mobile network operator or MNO, also known as a wireless service provider, wireless carrier, cellular company, or mobile network carrier, is a provider of wireless communications services that owns or controls all the elements necessary to deliver services to end-users, including radio spectrum allocation.
Mobile network operators install a number of base stations, while mobile subscribers use a circuit-like chip in their cell phones to access network services when they are in the range or coverage cell of a base station.
A Network Operator will monitor and troubleshoot communication and application-related issues through the use of network management and diagnostic tools.