More Phone Number for One Contact?

Apple iPhone - Adding More Than One Phone Number for One Contact

How can I add both a home phone # and a mobile phone # for one contact. I only see the option to add either a home phone number or a mobile phone number, but not both. Is there a way to add both? Thank you in advance.

iphone tutorial
Every time you add a phone number, the iPhone contacts adds another field. The first one it adds is call iPhone. Tap on the field name to change it to something else.

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After I hit send, I realized I might be speaking too technical. A field is a space for a phone number. I am used to using spread sheets.