premise: The dominant mobile network in the UK is Orange. Statistics suggest that, since purchasing T-Mobile, the Orange group provides a service to over 30% of mobile users in the United Kingdom. The second most popular network is O2. This company provides network coverage for an estimated 20% of all mobile users in the UK. O2 has proved to be the fastest growing network. This trend mirrors the range of prices offered by the network, the deals available and the amount of revenue spent on advertising. The smallest network providers in the UK are those which offer mobile services as a side-line to their main business, for example supermarket networks. Such providers are responsible for a marginal section of the total mobile service provided in the UK.
hypothesis: O2 offers the cheapest prices.