I work w/ a lot of kids and it'd be helpful to be able to clarify in the contact info, which numbers are the kids', which numbers are their parents', etc.
Add more options for labels for phone numbers. A lot of people don't have "home" phones anymore, but I work with kids so I could use a distinction between "client mobile," "mom mobile," "dad mobile," etc. Same with work numbers. A drop down box of common labels with an other/text option would be great!
