This process is designed to help you uninstall any previous version of Mobile Spy from your iPhone 3G / 3GS.
1. First, tap the Cydia icon. If the Cydia icon is hidden, access the interface, select Settings, turn off the hide icon functions, tap Save , and hit the Home button. This should make the Cydia icon visible if it was hidden before.
2. Once inside Cydia, tap the Manage field at the bottom of the screen.
3. Next, tap the Packages icon.
4. Scroll down through your list of applications until you find Retina-X. Tap it
5. Now tap Remove in the upper right corner.
6. Then tap the Confirm button in the upper right corner.
7. This next screen will appear. Cydia is now uninstalling Mobile Spy from your iPhone.
Once the Return to Cydia button appears, tap it to return to Cydia. Then, tap the Home button to return to the main springboard. Mobile Spy is now uninstalled from your iPhone.