UK MVNO TalkTalk Mobile announced a new agreement with Telefonica UK to use the O2 network to provide services to its 350,000 mobile customers, leaving behind Vodafone.

TalkTalk will be able to offer 2G, 3G and 4G services to bolster its recently-announced quad-play strategy in which it offers fixed voice and broadband services and the Plus TV package, with which it includes a mobile SIM.

The company said the Telefonica deal will “materially advance our plans to build a scale and profitable quad-play business over the medium term”.

The company said its mobile base has grown strongly in the past two years, with 9.5 per cent of its four million-strong customer base using its mobile services as of the end of September.

The deal means TalkTalk has switched from using Vodafone’s network on which it has offered 2G and 3G services since 2010.

Access to Telefonica’s 4G network in the UK is also seen as a “major step forward” in the company’s long term strategy to build a small cell and fibre-to-the premise network. TalkTalk already holds 4G spectrum for use within homes.

“We see real opportunities in both the near term and further out, to work with Telefonica UK to further accelerate our quad-play growth,” TalkTalk CEO Dido Harding commented.