Phones 4U faces investigation by telecoms regulator Ofcom for alleged phone mis-selling.

Ofcom said it had received “significantly high” numbers of complaints from the public about hidden charges, “unclaimable” cashback offers and misrepresented tariff terms.

According to The Financial Times, Phones 4U said it “intends to co-operate fully with Ofcom in this matter and is in discussion with them. Phones 4U prides itself in maintaining the highest standards of customer service. If any instances where this has not been the case are brought to light as a result of this enquiry, we will act accordingly”.

The investigation will be the first of its kind for Ofcom, which announced in March that it would introduce legal standards for mobile operators, after a voluntary code of conduct to prevent mis-selling had failed.