The organisations have committed to train staff in literacy and numeracy skills, equivalent to five GCSE qualifications, as part of being signatories of the Government's Skills Pledge.
Phones 4u's operations director Tom Shorten said: "If anything current market conditions make it even more important for all our staff to be the best they can be. We know from experience a better skilled workforce drives a more successful business."
Skills minister Lord Young, added: "The Government is investing £4 billion in adult skills and training this year so businesses and individuals get access to real help now.
"We have consistently said now is not the time to cut back on skills and training and I want to congratulate the employers honouring the skills pledge today."
The Skills Pledge was launched after the 2006 Leitch Review of Skills warned the UK to ‘raise its game' on skills. Since its launch, more than 10,000 business covering 5.4 million employees have made a commitment to improving employees' skills.
The other firms yesterday making the commitment include Bupa Care Homes, ISS UK, The Capita Group and Nestor Healthcare Group.
Top firms commit to staff training under Skills Pledge
Eleven corporations, including Phones4u, Network Rail and British Gas have pledged to provide training to 200,000 employees.
