TalkTalk has taken steps to improve the quality of its quad-play broadband packages, by signing a mobile virtual network operator (MVNO) deal with O2.
Under the multi-year agreement - signed with O2's parent company Telefónica UK - TalkTalk will gain access to O2's 2G, 3G and 4G services in the UK.
This means, for the first time, TalkTalk will be able to resell super-fast 4G mobile as part of its TV, home phone and broadband bundles.
The new deal - which replaces an expired MVNO agreement with Vodafone - should help TalkTalk increase the scale of its mobile business, while reducing costs.
At the end of Q3 2014, 350,00 consumers - 9.5 per cent of TalkTalk's subscriber base - took mobile services from the firm.
The availability of 4G mobile broadband may encourage more consumers to take out a quad-play broadband deal, rather than use more than one operator.
Dido Harding, Chief Executive of TalkTalk, said the agreement is "a significant development" for TalkTalk, building on the firm's success in mobile to date.
"We are ideally placed to benefit from the market shift to quad-play, with a sizeable and growing number of customers already choosing to take mobile from us," she stated.
"We see real opportunities in both the near term and further out, to work with Telefónica UK to further accelerate our quad-play growth."
Ronan Dunne, Chief Executive of Telefónica UK - which owns O2 - said the firm is "pleased" to sign an MVNO agreement with TalkTalk.
He claimed this builds on Telefónica's heritage of being "the trusted provider for many notable MVNO, public and private sector organisations in the UK".
Mr Dunne added that this recognition, as "a leading source of essential connectivity", comes as a result of the firm's "continued and significant investment" in its nationwide network.