This Phone Number Cannot Be Used To Sign In

Thank you, the the problem is I only have one apple id and this is my personal number, there less likely chance that someone are using my number or in past I have might created an apple id that i might completely forgotten.

So i have brought a new sim. And still it also showing the same

I was able to fix it by disabling Dial assist. Then activating FaceTime and iMessages I again enabled dial assist.

.

to disable dial assist settings > Phone : disable Dial assist.

Now, I’m using FaceTime and iMessages without any problem