Use WhatsApp’s built-in Linked Devices feature to use the same account on another device
Install WhatsApp on the second device
Open WhatsApp on the second device
On the primary phone, go to Settings
Tap Linked Devices
Tap Link a Device
Scan the QR code shown on the second device
Keep the primary phone connected periodically to maintain access
Use WhatsApp Business if you need a separate second account on the same phone
Use a dual apps or app cloning feature if your phone supports it
Install WhatsApp in a separate user profile or secure folder if available
Use a second phone number for a separate WhatsApp account
Restore a backup on a new device to move the account
Log out of linked devices when no longer needed