You cannot delete all of you contacts from your SIM card at once, but you can delete them individually. NOTE: Deleting contacts from your Phonebook does not delete anything from your SIM card. NOTE: The \"Manage SIM\" menu is only available through some service providers and only in certain countries. If this menu does not appear in the PHONEBOOK menu display, it\'s not possible to delete individual numbers to your SIM card. If this menu does not appear in the PHONEBOOK menu display, it\'s not possible to delete individual numbers to your SIM card. To delete a number on the SIM card, you must first delete the number from your phonebook, then copy all numbers to your SIM card using PHONEBOOK > ADVANCED > COPY TO SIM To delete a contact from your SIM card using the MANAGE SIM menu:PHONEBOOK > MANAGE SIM > EDIT ON SIM > C, press Yes

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