I was jailbroken before 3.1 and had the battery percentage indicator enabled in sbsettings. Now that I upgraded to 3.1 my jailbreak was obviously broken however I still have the battery percentage indicator. Is this a new feature for all iPhones? I have a 3G.
That's true. The battery percentage also gets backed up so if you restore from that backup, the percentage will get restored as well.
I restored my 3G iPhone from 3.1 down to 3.0 and I had to use an older backup that was from 3.0 and the battery percentage was back before I jailbroke it once again.
Nope. The 3Gs is the only one Apple deemed POWERFUL enough to render the extra "%" graphic. Having it on a 3G or lower puts your phone at risk of an exploding screen. 😛
I honestly don't know why they would make it 3GS only. It isn't really a selling point of the product............... However, excluding MMS from iPhone 1st generation was definitely for marketing.