BT has confirmed plans to move back into the consumer mobile market by introducing 4G services for existing customers.
Current BT broadband subscribers will be able to access SIM-only bundles of 4G data, minutes and texts at discounted prices.
The entry-level BT Mobile tariff offers 500MB of 4G data, unlimited texts and 200 minutes for £5 per month, while a bundle of 2GB, unlimited texts and 500 minutes costs £12.
The top-tier package, which comes with a 20GB 4G allowance with unlimited texts and minutes, is available at £20 per month.
Each BT Mobile tariff offers 4G mobile services, free Wi-Fi coverage across BT's network of public hotspots, BT Sport via the BT Sport app and "family-friendly" features such as spending caps.
According to BT, its customers will get "exclusive access to the best value 4G tariffs", with discounts of up to 50 per cent compared to non-BT Broadband customers.
The firm says its new 12-month contract deals are ideal for customers who might want to keep their existing phone but add a bundle of 4G data, minutes and texts.
Consumers can keep their older 2G or 3G handsets or buy a new 4G phone from the BT Shop from £99. They can each sign up for up to five mobile plans at the discounted rates.
John Petter, Chief Executive of BT Consumer, said offering BT customers the UK’s "best value" 4G data deal is "a great way to start our journey towards re-establishing ourselves as a major player in consumer mobile".
“These great value deals are a thank you from us to loyal BT Broadband homes," he stated.
"We are offering customers a new type of great value mobile deal that offers more than just data, minutes and texts."
Mr Petter noted that BT is offering 4G on the UK’s biggest network along with unlimited access to Wi-Fi via five million BT Wi-Fi hotspots nationwide.
“Our customers are consuming increasing amounts of data and they want the best possible connection wherever they are," he added.
"It’s our ambition to meet this demand by combining the power of our fixed fibre service with Wi-Fi and the convenience of mobile."
Ken Odeluga, a senior market analyst at www.cityindex.co.uk, said: "BT has stopped short of going all-in with a quad-play offer. For now.
"But its announcement on Wednesday of its first consumer mobile service for 13 years will fuel speculation that a BT cable, broadband, mobile and fixed-line bundle is little short of imminent."
Odeluga added: "That is the only game in town for consumer communications firms—as telephony margins fall.
"The main sticking point right now is of course regulatory clearance, primarily from the Competition and Markets Authority but also Ofcom, for BT’s £12.5bn takeover of EE."