Cydia now has an application that searches for contacts at the time of dialing. It integrates with the phone book iPhone and allows you to see the contact when entering a number, if there is one in the record. Moreover, if several phone numbers are recorded under one name, then flipping through it will be possible to find the desired one. In the settings, you can set the search for the first 3, 4, 5, 6, 7, 8 digits of the number. A handy application for those who have a large phone book. The program is installed from Cydia for free.