I am unable to delete some contact... While deleting the contacts it gives a msg read only contact...
How can I delete my contact?

Create a Contact:

1. Launch “Contacts”
2. Access “All contacts”
3. Tap “+” and select how to store or sync the contact
4. Enter the contact’s name, phone number, and other optional details in the appropriate fields
5. When ready tap “Done”

Import/Export Contacts:

1. Open “Contacts”
2. Tap “Menu” > “Import/Export”
3. Select to “Import from storage”, “Import from SIM card” or “Export to storage”
4. Follow the on-screen steps to complete the process

Assign Contacts to Speed Dial:

1. Tap and hold an empty area on the home screen
2. Go to “Widgets”
3. Drag and drop the “Direct Dial” widget in an empty area on the home screen
4. At the prompt, select the contact you want to associate with the Direct Dial widget

NOTE: You can repeat the steps above to add multiple Direct Dial widgets for additional contacts on the home screen. Furthermore you can organize these widgets in folders on the home screen by dragging one widget and dropping it over another.

Delete Contacts:

1. Open “Contacts”
2. Go to “All contacts”
3. Select the contact you want to remove
4. Tap “Edit” > “Menu”
5. Tap “Delete” > “OK” to confirm

Clear the Call Log:

1. Open “Phone”
2. Tap “Menu”
3. Go to “Call history”
4. To view more details on a call log entry, select it
5. To clear the call log, tap “Menu” > “Clear history”
6. Tap “Clear call log”

Create a Caller Group:

1. Open “Contacts”
2. Access “All contacts”
3. Tap “+”
4. Go to “Groups” under “Group name”
5. Tap “Create a new group” and enter the desired name for the group
6. Press “OK” > “Back” to confirm

Add Contacts to an Existing Caller Group:

1. Launch “Contacts”
2. Select “All contacts”
3. Tap and hold the contact you want to add to the group
4. Tap “Edit” > “Group name” and select the desired caller group
5. Press “Back” to confirm