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How to delete all info and phone numbers on the Casio GzOne Boulder?

To delete all user data and restore all settings to their initial defaults:
1. From standby mode press the Center Select Key (Menu), then press the Directional Key right twice for Settings & Tools, press 6 (Phone Settings), press 6 (Security).
2. Enter the 4-digit Lock Code, then press the Center Select Key (Ok).
3. Press 6 (Restore Phone).

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