Buzz Contacts has always been limited on iOS by not having access to call history, voicemails, and similar items. With the arrival of iOS 7, we had hoped to see progress on these fronts. Since that is not the case, we unfortunately could not justify further investment into this app and decided to remove it from the App Store.
Effective September 18, 2013, we will no longer be providing support for Buzz Contacts. The knowledge base will be left open for a period of time to assist answering the most common questions.