For fixing the freezing problem of this app, follow the steps below:
1. Add shortcut of Nokia City Lens to a homescreen
2. Rotate your phone to landscape mode
3. Now open the City Lens app and wait till it gets freezed.
4. After the app freezes, close the app by launching the task manager (Press and hold menu key).
5. Now switch your phone back to portrait mode.
6. Open City Lens.
7. Enjoy !
![smiley :)](http://sdf.allstarsoftware.co.uk/Smileys/xenforo/smiley.png)