Extremely well put by Texrat.

As for the call lists, the design as described seems to make the assumption that all entry types are equal. They're not. The 'Missed calls' items are many times more important than the 'Dialled' or 'Received' calls. They're used for completely different purposes too. So, if there are no tabs, then there should be a quick-filter icon or something that can be used to quickly select only the 'Missed calls' entries, for example.

I recall when I had a phone where I couldn't find the 'missed calls' list.. (due to a changed UI from the previous model) - it was maddening. I only had the everything-in-the-same-list functionality. If I hadn't found which button activated the tab-separated list (which I of course had assumed must be there) I would had thrown the phone into the recycling bin (after giving it a good jumping up and down on it first).