Contact Power Search! app for iPhone and iPad
Unfortunately the contact search on your device only searches the name. But we have the solution!
With Contact Power Search you can search ALL FIELDS of your contact list, including:
Name (First, Middle, Last, Nickname, Prefix, Suffix)
Address (Street, City, State, Country, Country Code)
Company/Organization
Job Title
Department
Notes
Email addresses
URLs / Home Pages
NEW: Phone numbers
...And More!
You also have the option of ALL of your search terms matching or ANY of them matching. You are in control!
From the main screen each contact has a button that takes you to the contact sheet. From there you can call, text message or email!
Update: Now handles very large contact lists efficiently