A telecoms or mobile carrier refers to a company or service provider that operates the infrastructure and network necessary for transmitting communication signals. Carriers play a crucial role in facilitating various forms of communication, including voice calls, data transmission, and internet connectivity.

There are different types of carriers, such as telecommunications carriers, internet service providers (ISPs), and mobile carriers. Telecommunications carriers typically manage landline or fixed-line communication services, while mobile carriers specialise in providing cellular network services. ISPs, on the other hand, focus on offering internet connectivity.

Carriers are responsible for establishing and maintaining the physical and virtual infrastructure, including cables, satellites, and network equipment, that enables communication between users. They often charge fees or subscription costs for their services, and users can choose carriers based on factors such as coverage, service quality, and pricing.