Field Test on 3590! Pic inside

[Ashbowl]

I've read that some say the Field Test is not availible on a regular DCT4 phone. Well, last night I was playing with my Nokia 3590. I set an alarm and turned the phone off to see if the alarm would go off. When it did, I turned the alarm off, and the phone gave me the option of turning it on or off. So I turn the phone on, and when I did, only the battery status and Menu came up on the screen. So I go to the Menu and lo and behold, menu 11 was the field test. I tried to select it, but whenever I did, it just took me back to the main screen. It wouldn't let me access some of the regular menus as well. Has this been heard of before? Can anyone explain it? Thanks!

[Ashbowl]

Here's a picture of it.

[Ashbowl]

Here's a better picture of it.