Wow! I learned something from your post regarding Outlook contacts! I never knew about the advanced settings with phone numbers. Currently, this isn't a feature that we offer with DIGITS, but I'd love to pass this along as I believe others that have their contacts imported from Outlook can benefit from this feature.
Yeah, if you have Outlook, then double click on an underlined phone number in a phone number field. You can type anything in the Extension field such as “Bob Smith’s best phone number on the weekends.” It’s a great way to comment on phone numbers. It seems that the DIGITS team would just need to make an advanced setting that users could select that would ignore any characters after the “x”.