Why does my email pop-up as my caller ID when FaceTiming on my iPhone?

Maybe you've set up your email address as your caller ID. To check this, you can:

1. Open the Settings app on your iPhone, tap on "FaceTime" to view its available preferences.
2. In the FaceTime settings, you'll see a section called Caller ID, and only one from the list will be check marked.
3. Check the detailed number of your caller ID and change it to the number you want.