Hi vinnu,
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This may be related to a software based issue, I first suggest that you hold down the Power Key and Volume Down key together and restart the handset.
If this has not affect then I can only suggest that you try performing a software repair on the handset, this can be done by doing the following
PC Companion
To repair the phone software
1. Install PC Companion on a Windows PC from Support
2. In PC Companion, under Support Zone and click Start.
3. Under Phone Software Update, click Start.
4. Click repair phone.
5. Follow the on-screen instructions.
I apologize for any inconvenience this may cause.
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