The latest update just announced is version 6.1.2, which will patch up the following Apple devices:-
- iPhone 3GS and later
- iPad 2 and later
- iPod touch 4th generation and later
- iPhone 5
So what's new? Officially, it's to fix "an Exchange calendar bug", which may reduce battery life as a result of increased network activity. That's all, as written on Apple's support site at http://support.apple.com/kb/DL1639. As battery life is dependent on several factors (like how you actually use the phone, what apps you have running in the background, WIFI, GPS, 3G, etc.), I'd sure like to know if anyone out there had any positive experiences after the OS update (with real data, as opposed to feeling, which is highly subjective).
Although iXXXX products from Apple appear very similar through the generations, there may or may not be a lot of changes going on under the hood. Products which are a couple of generations back are either no longer compatible with the latest updates, or are intentionally not supported (perhaps a clever marketing strategy to force users to upgrade?).
Well, obviously, this update is from Apple, so if you are using an, ahem, alternative but similar OS for your iXXXX device you may want to give this a walk over until such equivalent update is available.
Otherwise, you should patch up your device anyway, as there is generally no harm in running the latest updates from the manufacturer, even though you're not immediately affected. Never know what the future holds....