Yes, I'm one of the persons to blame on this, I worked on this Call design at some point. It certainly was a conscious design decision. What's wrong with tabs? They split the information up onto multiple pages. You cannot see the overall call history anymore. Be on the outgoing page - miss perhaps information on the incoming call tab. Be on the incoming call tab - miss or have to switch to another page to call again the person you just called. Somebody might get 8 calls from separate persons and miss the information for the 9th call? Well, scroll downwards. So yes, tabs were evil here. If I would redo the design, I wouldn't change this. (Well, naturally also since we didn't do tabs elsewhere, it was another argument towards not doing them here.)