How can I recover delete files from my Nokia Mobile and its Memory Card?

I deleted some of my major files accidently which requires very ungently know.
Please agree to me know how can I recover my file or software name.
thanks

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Answers:

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you can't

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you can recover it next to a software but unfortunately i dnt know the describe of the software.
go to the local phone merchant and he will surely help u coz they hold all the softwarres( they wont charge much).

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