A sweet hack which will enable anyone to use turn-by-turn navigation anywhere in the world, even if your country is not supported.
1. Titanium Backup Method:
Step 1: Firstly, in Titanium Backup, make a back up of the "Maps" app.
Step 2: After the backup, now select Maps, wipe its data, and then completely uninstall it.
Step 3: Do as above for Street View – wipe data and uninstall.
Step 4: Then install maps 5.7.0-ownhere-testkeyresign.apk (link at the end).
Step 5: And finally, go to the Android market and reinstall Street View.
2. Using the versatile command line tool Android Debug Bridge (adb):
Step 1: First uninstall Maps from /system/app
Step 2: adb remount
Step 3: adb push /maps5.7.0-ownhere.apk /system/app
3. Alternatively, you can install the flashable .zip file using CWM Recovery.
Required Files (Remember you only require one of the following depending on your chosen installation method).