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Nokia 2730 classic is having a bluetooth problem. Every time when I transfer data from 2730c to any others mobiles it just got hanged and I need to restart it. After that, transfer is successful. Few days ago I updated my 2730c to latest software( from RM -578 v10.45 to RM-578 v10.47) from nokia care centre thinking it could have fixed the previous bluetooth issue, but no it didn't.
Have you tried Restoring your phone to factory settings? If that doesn't work, then try re-installing your current firmware through Nokia suite. IF the problem persists, you will need to to visit your local Nokia Care point for them to inspect: http://nokia.com/support