Send the following on WhatsApp
Continue to ChatUse same WhatsApp account on multiple phones (official method) https://www.techmesto.com/use-one-whatsapp-account-on-multiple-phones-official-method/
Use same WhatsApp account on multiple phones (official method) https://www.techmesto.com/use-one-whatsapp-account-on-multiple-phones-official-method/