when I send a text message and use the messaging lookup feature to select a contact, only some of my contact numbers appear. For example, under Jane Doe there might be a mobile number and an email. But under Joe Doe, only his mobile will appear even though he also has a pager and an email.

Today I tried to send a text to a number I had just added to an existing contact, and that number did not appear as a choice when I used the messaging lookup feature.

I am wondering if I need to do something specific to a number when I add it to a contact in order for it to appear in the sms lookup.