The following changes have been implemented:
1. Possibility to define a record limitation for the number of records to be shown in the "Recents";
2. Automatic/Manual removal of old calls from the Mobile log database;
3. Support for VCard import (Contact) received via SMS;
4. Call info support for unknown numbers;
5. "Text Message", "Add to Favourites" function for unknown contacts.
You can download and install iLog from the iClarified Cydia Repository. The application costs 4.99 EUR and does have a free trial period. If you do not already have iClarified as a Cydia source you can follow the instructions to add it: here.