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[Resolved]  Sony Erricsson, C510i Mobile — Ciphering not provided by operator. insecure transmission

Hello,
since yesterday my cell is promting this message "Ciphering not provided by operator. insecure transmission", and due to which contact names have changed to some encoded names and i'm not able to view my contact list also, hence i'm not able to contact any one in my contact list. i get this message when ever i receive or dial a call. pls help. its causing a major problem.
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Complaint marked as Resolved Aug 14, 2020
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