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Question:

How can I format/ Unlock my locked 512mb MMC Card through Card Reader?

i have a nokia 7710 MMC was working fine then i bought a card reader the MMC was not detected in the reader so i placed the card in a nokia 6600 and then it flashed me that the card is locked enter password and i haven't entered a password in the card till date so why is it asking for a password now it is not working on any phone somebody pls help

Answer:

Could be a faulty card. How long have you had the card for? Could someone else have placed a password on it? Try getting hold of another card reader (or phone which reads that type of card) to determine the problem.
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