iPhone "Field Test" mode
Tue, May 19 2009 01:07
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The iPhone's Field Test mode gives technical information on how well the iPhone is connecting to the cell towers.
To activate Field Test Mode: bring up the keypad, type in *3001#12345#* and press the Call button.
This brings up the Field Test main menu. (Note that you should see the signal strenth bars in the upper left corner of the screen replaced with a number indicating the strength of the signal in decibels.)
The signal strength is indicated as a negative number, and the lower the number the better. You can use this feature to determine where the best reception is at work and at home.
To activate Field Test Mode: bring up the keypad, type in *3001#12345#* and press the Call button.
This brings up the Field Test main menu. (Note that you should see the signal strenth bars in the upper left corner of the screen replaced with a number indicating the strength of the signal in decibels.)
The signal strength is indicated as a negative number, and the lower the number the better. You can use this feature to determine where the best reception is at work and at home.
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