To Login to a WhatsApp account,
- Open the WhatsApp application on your device.
- Accept WhatsApp terms and Conditions.
- It will ask you for a mobile number that has a WhatsApp account.
- Enter the mobile number and proceed.
- As soon as WhatsApp find that your mobile number already created a WhatsApp account, it will start syncing your account data including the Chat history, Groups, Contacts, etc.
- Skip the name selection if you don’t want any changes.
- After the process completes, you will be successfully logged into WhatsApp.