One of the biggest new features of iOS 6 is the new reinvigorated Maps app, which no longer relies on data from Google. The new Maps app also features turn-by-turn directions, and 3D capabilities.
Here is the Video from iDB:
Note: This works for the iPhone 4, iPhone 3GS, and the iPod touch 4th generation. You must have iOS 6 installed on your device to follow this tutorial.
Step 1: Jailbreak ios 6 installation using Redsn0w 0.9.13dev1 [Tethered Jailbreak].
Step 2: Install Cydia.
Step 3: Install iFile from Cydia, and then use this link to install the 3D Enabler package. Afterwards, kill the Maps app, and reopen it, and the 3D Maps icon should now be permanently visible.
Not Tested : you can use Ryan Petrich’s iOS 6 beta repo (http://rpetri.ch/ios6/) to install Unlock iOS 6 Maps — a package that will accomplish the same thing.
Have you enabled 3D maps on your older device yet?