Facetime
Facetime is not working by my phone number only by mail what should I do?!
iPhone 6
it depends on many factors like which country you lived? there must be specific plans by service provider to use facetime on iphone.
secondly it could be proxy or ip error. as facetime is end to end encrypted service, proxy won't work on it. so you need to check if your network provider is still giving wap services or complete web services. check here: https://facetimeforpc.site