I discovered an odd Field Test bug that I thought I'd share. I haven't figured out how to reverse it (other than a restore, which I think would work), so be forewarned.
To enter Field Test mode, pull up the dial pad and type: *3001#12345#* -- then hit CALL.
You'll notice three menu items, but of interest here you'll see that the signal bars turn into the -DB signal information. If you hit the home key it sets back to normal and the signal bars return.
Enter the glitch.
If, instead of hitting the home key, you reset the phone (by holding the sleep and home keys until it resets) while in Field Test mode, the signal bars appear to be permanently replaced with the -DB signal information, as per the attached screen shot:
To enter Field Test mode, pull up the dial pad and type: *3001#12345#* -- then hit CALL.
You'll notice three menu items, but of interest here you'll see that the signal bars turn into the -DB signal information. If you hit the home key it sets back to normal and the signal bars return.
Enter the glitch.
If, instead of hitting the home key, you reset the phone (by holding the sleep and home keys until it resets) while in Field Test mode, the signal bars appear to be permanently replaced with the -DB signal information, as per the attached screen shot: