I suspect it is less valuable than call logs. I have never deleted contacts so I have over twenty years of entries with pretty low value (e.g. call this number

I suspect it is less valuable than call logs. I have never deleted contacts so I have over twenty years of entries with pretty low value (e.g. call this number to find out about this real estate offering; my old mechanics for on 2003 old phone number) or accuracy. I only call about seven people but those are significant links.