Why can't I call this number?

Every time I call my friend's phone my phone rings only one time and it hangs up by itself how can I fix this problem? She can call me but I can't call her at all only text her. I have an iPhone and we both have t mobile. This has been happening for a while.

This is happening to me too. Droid Razr Maxx, Verizon.

  • Why is my iPhone number being displayed wrongly on my number? My number is X, but on "my number" settings, it's being displayed number Y. Why is that? Also, some people told me that when I call or text them, the number Y is appearing to them, not the number X as it should. On the other hand, if I call the number X, my iPhone rings normally, but the same thing doesn't happen when I call number Y.
  • Why is mobile sending number different to my number? I recently bought an Iphone and did a sim swap so I could keep my phone number. Everything has been ok. However, when I send an imessage it shows the recipient a different number to mine. I don't think this happens when I send a SMS. Presumably it's the original number for the new sim? Why is this?
  • Why can't I call this number? - 1 I used my pixel to call a number and it says call can't be completed but then when I used an iPhone to call it it goes through… Why is that?
  • Is it possible to block a number so I can't call it? Long story short, I went through a really bad breakup and I want to know if there's a way to block it. I don't want him to just not call me, but I also want it to be impossible for me to call him if I'm ever in a moment of weakness. Also, is there a way to block a website on my iphone so I can't go to it?