Mobile phone users say the UK's biggest networks are letting them down on value for money and customer service, a study by consumer champion Which? has revealed.
O2, EE, Vodafone and Three were ranked lower by users on both fronts than lesser-known rivals. This is despite the smaller virtual networks using the same masts and other infrastructure as the "Big Four" rather than running their own services.
Three scored the lowest of the Big Four and received the lowest rating of any network for reliability. Nearly half (45%) of Three users experienced problems in the past year compared to three in ten (29%) across all mobile network customers surveyed. Virtual network Smarty uses the same infrastructure as Three but came first in the table with five out of five for value for money.