The coverage of a network is crucial for the service provided to the client. In the UK there is near ubiquitous coverage in all cities, towns and much of the surrounding area. However there are areas where the MNO do not provide a service for customers. There are predominantly in more remote areas. Additionally coverage difers for the 2G / 3G / 4G networks.

The MNO provide a way to check the coverage using maps and computer siluation. In reality in areas of marginal coverage the actual coverage may be better or worse due to geographical or structural features. Also atmospheric conditions also can affect the coverage