I had this same problem. The solution that I was able to come up with is to log into Gmail on my computer and look at my contacts. Then I created a new group called 'With Numbers'. I then checked the box of any contact that had a phone number associated with it (approx. 400) I then just added these contacts to that group.
This is more tedious of method than I would have preferred, but it worked for me when I went in to the people app, use the custom selection, and only display that group.
The only problem that I think this might cause is when you go to add a New Contact. If it's possible to add the contact to the list as well, then there shouldn't be a problem.
I'm sorry if this isn't very clear, if you have any questions, let me know.
