Since Apple didn’t give turn-by-turn and 3D Flyovers to iPhone 4 and iPhone 3GS users on iOS 6, some Russian hackers managed to get turn-by-turn and 3D Flyovers on iPhone 4, 3GS on iOS 6 beta. The Russians hackers developed a tweak called 3DEnabler that enables 3D Flyovers and turn-by-turn navigation on older iOS devices.
The hackers enabled this two feature without jailbreaking it or using Cydia, because the current tethered jailbreak for iOS 6 beta doesn’t install or download Cydia to your device. The guide to install this tweak is in Russian website iGuides.ru. But be careful if you do this; the instructions are in Russian so drink some vodka before doing this. And as you can see, it doesn’t perform as goo as on an iPhone 4S. They like Hip-Hop.