My wife's mobile phone has just failed (Galaxy S7) so I have temporarily transferred her SIM Card to my Galaxy S7 (which also has Whatsapp installed) so my Galaxy 7S now has her mobile phone number and she can make phone calls as normal. My question is will she be able to send and receive Whatsapp messages on my Galaxy S7 without changing anything ?
Hello, she should be able to use WhatsApp normally, although as you previously had WhatsApp set up on your Galaxy S7, it will still be connected to your old number. You just need go into the WhatsApp account settings, and change number to migrate account info.
You will then need to confirm that your new number can receive SMS or calls, and tap Next to verify that number.