Field Test Mode hack

Discussion in 'iOS 5 and earlier' started by CBR900RR, Oct 19, 2011.

  1. CBR900RR macrumors 6502a

    Oct 11, 2008
    Middle of Pacific
    Start up you phone dialer, type *3001#12345#*, send, it will take you to field test mode with the numeric signal number.

    With the field test mode still on, reboot the phone by holding the power and home button together until you see the apple logo, release both the button, let it boot to home screen, and now you can toggle the signal between bar and numeric by tapping it.

    To reverse the effect, start up you phone dialer, type *3001#12345#*, send, when you in field test mode, just hit the home button to exit and you phone will be back to normal.

  2. mulo macrumors 68020


    Aug 22, 2010
    Behind you
    testing now, updating in a few seconds :)

    update: works flawlessly as described :)
  3. saving107 macrumors 603


    Oct 14, 2007
    San Jose, Ca
    This trick has been known for a while, but the method to reverse doesnt always work and the only way to fix this is to Reset your Network Settings.

    Just a heads up.

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