I have a series 2 watch and an iPhone 12 Pro but the wallow talkie feature is not working. Does it work with your phone number? I have all the settings correct…to be reached via FaceTime at email ticked off etc.

How do I get my series 2 watch to work with my iPhone 12 Pro. It is installed and everything but when my niece adds me it says I cannot use the walkie-talkie feature or something like that. I have the FaceTime to be reached at setting setting to both my phone number which is a guyana number and my Apple ID email. Is it my phone number that is the issue? I removed my phone number and it still doesn’t work. The watch is a gift hence the old series. The phone is as well.

many help would be greatly appreciated.