As iOS 6 features such as turn-by-turn navigation and Siri become increasingly localized, it can be difficult to keep track of exactly what is available where. To help ease confusion in the wake of the iPhone 5 announcement yesterday, Apple has published an official list, navigable by feature, showing availability from Afghanistan to Zimbabwe.
The most restricted aspect of the OS is the new Maps app's 3D Buildings functionality, which, according to Apple's list, is only available in the US. Standard mapping functions have extremely broad support, and most of Siri's localization features function across North America, Australia, and Western Europe, but more advanced features such as restaurant reservations are only supported in the US, Canada, and Mexico.
Interestingly, social features in Siri such as Facebook and Twitter integration are only available in a relatively limited area, comprising key markets in Europe, Asia, and North America, along with Australia. It is not yet clear whether Apple has plans to bring this functionality — not an obvious choice for extreme localization — to more regions in the future.