The move by PwC is hoped to boost the company’s prospects after it was fined by the UK’s accountancy watchdog over its auditing of BHS before its sale.Peter Earl, head of utilities at comparethemarket.com, said: “The death of the landline is ‘hopefully’ upon us. Smartphones are slowly but surely marking landlines obsolete, and generations Y and Z will likely ensure its final demise.“As mobile coverage improves across the country, the number of people who will use a fixed line will inevitably decrease.”Earlier this year, BT was forced to reduce the cost of a landline by £7 a month to customers that only had a landline in their homes.The price cut came after an investigation by Ofcom revealed that despite the significant increase in landline rental prices, the cost of providing the service had dropped by more than a quarter. The end of the era of using landlines has been marked after an accountancy giant decided that all staff should now only use mobile phones.Accountancy company PwC is doing away with landlines at office desks, expecting its 18,000 staff to use the “more efficient” mobile phones by the end of the summer.This new approach reflects the wider global trend of companies moving away from stationary telephones towards handheld devices.A spokesman for PwC said: “We already equip all of our people with a mobile phone, and many had already moved away from using their landlines.“With landline usage falling rapidly, we believe that a more mobile-focused policy is a more efficient way of working.”A few landlines will remain for security purposes, but meeting rooms will now use conferencing technology that can connect to mobiles.The auditing giant is one of the first major companies to make the move amid a steep fall in landline use by businesses.In 2010, UK business had over 10 million landline numbers, but this figure had fallen by 35% by the end of last year, according to telecoms watchdog Ofcom.The amount of time businesses spent talking on landlines also dramatically dropped ,as well as their use by residents. In 2010, UK households made over 90 million minutes of phone calls, but this number was slashed to just 35 million minutes last year. UK households and businesses have seen a decline in landline useCredit:Hero Images Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.