iOS devices: Open Contacts > Groups > All Contacts > Edit > Delete All. Android device: Open Contacts >Manage Contacts>Delete Contacts>All. Other methods: 1. Use cloud services to delete contacts synchronously; 2. Use SIM cards to delete contacts.
How to delete all mobile contacts
iOS devices
- Open the Contacts application.
- Click "Group".
- Click "All Contacts".
- Click "Edit" in the upper right corner.
- Select "Delete All" at the bottom of the screen.
- confirm deletion.
Android devices
- Open the Contacts app.
- Click on the three dots in the upper right corner.
- Select "Manage Contacts".
- Select "Delete Contact".
- Click "All".
- confirm deletion.
Other methods
Use cloud service to synchronize deletion
- Open on your device " set up".
- Go to Accounts & Sync.
- Select your cloud service (e.g., Google, Outlook).
- Uncheck the "Contacts" option.
- This will delete all synced contacts from your device.
Using the SIM card
- Remove the SIM card from your device.
- Use the appropriate SIM card reader or adapter for your device.
- Open the SIM card manager software on your computer.
- Delete all contact data on the SIM card.
- Put the SIM card back into your device.
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