Mobile phone operator EE revealed today that it will fork out £275 million next year on improving the quality of the phone calls made over its network.

The money, which is coming out of its £1.5 billion network investment, will go towards upgrading 5,000 additional 2G cell sites and doubling capacity on 5,500 3G cell sites around the country. The work will build on improvements that have already been put in place, but will see far more 3G sites upgraded than the 1,600 that were revamped this year.

A chunk of the funding will also go towards trialling new voice technologies like VoLTE (Voice over LTE) and Voice over WiFi.

The investment builds on EE’s efforts this year which involved upgrading 20-year-old 2G equipment at over 6,000 sites, increasing the capacity on 1,600 3G sites, and installing a new HLR (Home Location Register) database. 

The mobile operator said the volume of calls made over its network has risen 25 percent since the beginning of 2012 to over one billion every week.

It has a current dropped call rate of 0.8 percent but it wants to cut this to 0.5 percent by the end of 2014. 

EE CEO Olaf Swantee said: “I think the UK mobile industry can do better, and we intend to improve the experience for our customers, taking our quality and reliability to levels to those achieved by other operators across Europe.”

The mobile operator, which was the first to offer 4G in the UK, has previously focused the majority of its marketing efforts around the speed of its mobile internet services

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