“Not all preferences appear in your iPhone Settings application. As I discussed rather thoroughly in my Modding Mac OS X book, it’s not that hard to dig through applications and discover undocumented–or in this case unpromoted–preferences that add spice to your Mac or iPhone. I decided to put the iPhone’s SpringBoard to the test. That’s the app that runs your main home page. This core application contained over a dozen user-settable preferences. I tested them all and selected my six favorites. If you have access to the command line, you can start having fun with these settings yourself,” Erica Sadun reports for TUAW.
Sadun explains how to:
1. Set a fake “time”
2. Setting a fake carrier
3. Hide certain apps
4. Use the “iPod touch” dock style
5. Use numeric Cell signal strength values
6. Use numeric WiFi signal strength values
Full article here.