Your Question is that is it possible to call on other Phone without showing my Number on his Phone. There is no direct way of calling on other Phone without showing your Number however It can be done if both Phones have Internet. You can use Softwares like Skype to call from one Phone to another and your Number will also not show by calling Skype to Skype through Phone. There are such other Softwares as well to make Calls through Internet from one Phone to another.