How can you change WhatsApp phone number without losing data iPhone?

Changing your WhatsApp phone number on an iPhone without losing your chat history and data involves a process that ensures your messages, media, and settings are transferred seamlessly to the new number. Here's a step-by-step guide on how to do it:

### Pre-requisites:
- **Both Old and New SIM Cards**: Ensure you have access to both the old SIM card (current WhatsApp number) and the new SIM card (new WhatsApp number).
- **Access to WhatsApp**: Make sure WhatsApp is installed and updated on your iPhone.

### Steps to Change WhatsApp Phone Number without Losing Data:

1. **Backup Your WhatsApp Data**:
   - Before changing your phone number, it's crucial to back up your WhatsApp data. Here's how:
     - Open WhatsApp.
     - Go to **Settings** > **Chats** > **Chat Backup**.
     - Tap on **Back Up Now** to create a backup of your chats and media to iCloud.

2. **Insert New SIM Card**:
   - Insert the new SIM card with the new phone number into your iPhone.

3. **Open WhatsApp and Verify New Number**:
   - Launch WhatsApp on your iPhone.
   - You will be prompted to verify your new phone number. Tap on "Agree and Continue" or similar to proceed.

4. **Verification Process**:
   - WhatsApp will attempt to verify the new number via SMS automatically. If this doesn't work due to international SMS limitations, choose the option to verify via call.
   - You will receive a call on the new number with a verification code. Enter this code into WhatsApp to verify the new number.

5. **Transfer Your Account Information**:
   - After verifying the new number, WhatsApp will ask if you want to transfer your account information, including your chat history and media, from your old number to the new number.
   - Tap **Next** and follow the on-screen instructions to complete the transfer.

6. **Restore Chat Backup**:
   - During the setup process with the new number, WhatsApp will ask if you want to restore your chat history from iCloud backup.
   - Choose **Restore Chat History** to restore your chats and media from the most recent backup.

7. **Notification to Contacts**:
   - WhatsApp will notify your contacts about your new number automatically. They will see your new number in their contact list.

### Important Notes:
- **Backup Regularly**: Regularly backing up your WhatsApp chats ensures that you have recent data to restore in case of any issues during the number change process.
- **Verification via Call**: If you have trouble receiving SMS on the new number (especially international numbers), opt for the call verification method.
- **Data Charges**: Be aware of potential data charges or fees associated with changing to a new number, especially if it involves international use.

By following these steps, you can change your WhatsApp phone number on iPhone without losing your chat history and data, ensuring a smooth transition to your new number.