BT is re-entering the UK’s consumer mobile phone market with a range of 4G subscriptions.

Its cheapest offer is aggressively priced at a discounted rate of just £5 a month for existing BT broadband customers.

The service will use both spectrum the company owns itself and that provided via a partnership with EE – a network that BT is attempting to buy outright.

One analyst said that bundled access to football games could help the company.

BT is offering customers who sign up to its BT Mobile contracts the ability to watch Premier League football matches that it owns the rights to via an app, even if they are not broadband customers.

“An entry tariff of £5 a month will grab headlines, but inclusive access to BT Sport and five million wi-fi hotspots offers important differentiation in a cut-throat field,” said Paolo Pescatore from the telecoms consultancy CCS Insight.

“We expect initial low-key marketing to heat up as BT makes a broader assault on the bundled telecom market over the summer.

“BT is a credible player in the telecoms market. And it is likely to be in a far stronger position next year with the inclusion of EE, which is currently subject to regulatory approval.

“Its rivals should be threatened by this move and Sky in particular will need to react swiftly given how punchy BT’s SIM-only deals are. It may need to launch mobile a lot sooner.”

BT’s basic deal – which includes 200 minutes of calls and 500MB of 4G data – is set to cost £10 a month for those of its customers who do not already have a BT broadband subscription.

BT is the UK’s biggest broadband provider with 7.6 million consumers signed up to the service, according to its latest figures.

The mobile deals it has announced so far are all SIM card-only, meaning that calls, data and texts are included but not a handset.

BT has said it will provide more details of its strategy after its proposed £12.5bn takeover of EE – currently co-owned by Orange and Deutsche Telekom – is complete.

Regulators have still to sign off on the acquisition, which is being opposed by some of BT’s rivals.

BT was one of the pioneers of the UK’s mobile phone sector with its Cellnet service in the 1980s, but sold the business – which had been rebranded as O2 – to Spain’s Telefonica in 2005.

The UK’s second-biggest broadband provider Sky has also announced that it has plans to offer a new mobile phone service, allowing it to offer its own rival “quad-play” bundle – including internet, landline phone, TV and mobile – but has not scheduled the launch until 2016.

Virgin Media and TalkTalk - the country’s third and fourth-biggest broadband firms - do offer packages including all four services.

However, their mobile phone services are both limited to 3G data at this stage, meaning they are likely to provide slower mobile internet speeds than BT’s 4G service.