Earlier this week, Branson said that he thought NTL would have to offer as much as £100m extra as shareholders rejected the cable firm's bid.
In a statement issued this afternoon, NTL said: "NTL continues to believe that its potential offer at 323p per Virgin Mobile share represents better value, for all Virgin Mobile shareholders, than Virgin Mobile's standalone alternatives and will make a further announcement in due course, if and when appropriate."
Branson, who owns 72% of Virgin Mobile, said that he thought a deal would still be done.
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