rajini vaydyanathan, bbc news.de campaigners are calling for action on what they say is an "appalling lack of progress" in improving mobile phone coverage in rural areas. they've been backed by more than 50 mps, who've accused mobile operators of failing to put up new masts, despite help from government. jon donnison reports. these days, life without your mobile, for many, seems almost unimaginable. but in some parts of rural britain, it remains a reality. the communications regulator 0fcom says only 57% of people living in premises in rural areas are able to make phone calls on all four mobile networks. that compares to 90% in urban areas. now 50 rural mps have written to the secretary of state for digital culture, media and sport, matt hancock, calling for urgent action to change that. they want legally binding targets to force mobile operators to improve coverage. we know where you have people walking, driving in country areas it is important they have a mobile signal so if they need emergency services help part