This feature allows you to change the phone number of your WhatsApp account and migrate your account information (including your profile), groups and settings to a new phone number account on the same device.
Before making the number change, make sure you have enabled the new phone number to receive SMS and calls and have a data network connection. And reconfirm the phone number of your current WhatsApp account on your phone. Go to WhatsApp > Menu > Settings > Tap your avatar
Note: When you change your WhatsApp phone number, your contacts will not be informed of your new phone number and only your group members will see that you have changed your phone number. Therefore, please inform your contacts before you start changing it.
Step 1: Insert the SIM card with the new phone number on your device.
Step 2: Open WhatsApp.
Step 3: Double check that the existing WhatsApp account is the original phone number. Go to WhatsApp > Menu > Settings > Tap on your avatar
Step 4: Go to WhatsApp > Menu > Settings > Account > Change number
Step 5: Enter your original cell phone number in the first box.
Step 6: In the second box, enter your new mobile number.
Step 7: Click Done.
Step 8: You will need to verify the new mobile number.