This is important for unlike mobile phones, use of the Internet requires a certain degree of skills. The indicator, which refers to "the percentage of inhabitants living within range of a mobile-cellular signal, irrespective of whether or not they are mobile phone subscribers or users" (ITU, 2015), reflects the infrastructure availability aspect of the target since it measures the possibility to subscribe and use mobile cellular services. By including the breakdown "by technology", the indicator is flexible in terms of technological development.