Carphone shares have continued their fall amid further fears about the strength of the business.
Shares have lost some 20 per cent of their value since yesterday morning.
The slide follows the announcement that Vodafone in Britain was switching its sales exclusively to Phones 4U; the business had previously been shared between the two companies.
Carphone's traditional appeal has been that it can offer phone deals with all the big operators, but that now is under threat.
Carphone insisted the loss would not damage its financial performance.
Vodafone cut its links a day after the Carphone announced it had bought AOL's Internet access business from Time Warner.
Analysts are warning that Carphone could lose some 500,000 of the 1.5 million broadband customers it should gain through the AOL purchase.