Is there anyway to update the Calendar and Contacts app on the Nexus S? I thought they were part of the OS and would update when I update the OS but that doesn't seem to be the case. I'm currently running Andriod 2.3.6 and I was just playing around on my brothers Galaxy S2 and he's only on 2.3.4 but his calendar and contact apps are far more up to date. For example in my contacts screen I only have four tabs, phone, call log, contacts, Favourites. On his screen he has a groups tab that I'm completely missing. Is this is just something that can't be updated on a Nexus S?