The address book has the following design issue. When you select a contact you can not see the phone number unless you select to edit the contact. A 10 digit number is always truncated.
However, there is plenty of horizontal space to move the phone number to the left so that the whole number is visible.
From the source.puri.sm I was redirected to Gnome to file a feature request. Since this issue is for small screens such as L5 I thought it would be good to mention it here too.