hello, My iPhone is showing unavailable for iMessage and FaceTime for my phone number

Re: hello, My iPhone is showing unavailable for iMessage and FaceTime for my phone number

If Wi-Fi connectivity is poor, Wi-Fi Assist automatically switches to cellular data to boost the signal.

You may want to check your cellular data plan allows FaceTime calls and text Messages:

(you might use more cellular data, which may incur additional charges depending on your data plan)

How to: View or change cellular data settings on iPhone - Apple Support

Also: Wondering if Apple support's online article can help:

How to: Add or remove your phone number in Messages or FaceTime - Apple Support

More support: FaceTime Support website: FaceTime - Official Apple Support

or

Messages Support website: Messages for iPhone, iPad, Apple Watch, and Mac - Official Apple Support