Last week we reported that Facebook was performing a global roll out one of its biggest interface updates, named Timeline. Naturally, the mobile versions with the new interface would follow suit shortly after.
While Timeline was introduced almost concurrently for the desktop and Android version of Facebook, the iOS variant just rolled out the Timeline update. Do note that the update is currently available for the iPhone, though the iTunes App Store has stated that an iPad version is in the works.
Lastly, if you wish to enjoy the mobile Timeline interface, you will need to activate the web-based version first.