How does one format "phone numbers" using "Numbers"?

Question

Want all phone numbers to format as [phone]
How is this done?

Answer 1

Hi Thomas,
The old Numbers will be on your computer unless you deleted it. Look in a folder called iWork '09 inside your Applications folder. Launch Numbers 2 (Numbers '09) and do what you used to do to create a Custom Cell Format. For example, you might want a nine-digit phone number to appear as (123) 456 789.
Save that document. To protect it from Numbers 3.0, make a copy of that document with a different name. Ensure that both your original Phone Number documents are closed (to protect them from that bully Numbers 3.0). Then Open the copy in Numbers 3.0. The custom format will be listed in Format Inspector > Cell > Data Format
Type a nine-digit number into any cell and format the cell with Format Inspector > Cell > Data Format > Phone Numbers.
Note: copying a cell with Custom Format in Numbers 2 and then pasting into Numbers 3 does not work. The pasted cell ends up as Text, and the Custom Format is not added to the Data Format list.
Regards,
Ian.