Turn Off Field Test Mode

My iPhone 4 "inherited" the Field Test Mode from my 3GS (that had been upgraded to iOS4) when I brought across my apps from the 3GS. Field Test Mode with iOS4 seems to operate on an app by app basis, rather than being able to set the signal strength bars or the dB reading and staying in the selected mode for all apps until changed.

So, after numerous searches, I can't find a clear, definitive way to turn off or delete Field Test Mode. I've tried to reset network settings and the usual reboot, etc.

I've passed on a total reset because the Field Test capability was passed from by 3GS backup to the iPhone 4.

Anyone have a clue?

iPhone 4, Mac OS X (10.6.4)

Posted on Jun 27, 2010 3:54 PM

Top-ranking reply

ecallow

Level 1

5 points

Posted on Aug 13, 2012 2:55 AM

You can quit Field Test mode by going to Phone then typing in *3001#12345#* then call while in the Field Test Menu hold down your power button then when the slider appears DO NOT SLIDE IT hold down the home button until the home screen appears you are now out of Field Test Mode fully!

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54 replies

greenmoo

Level 1

9 points

Jun 2, 2014 12:24 PM in response to MacAdam1569

No problem, glad it helped you! :-)

Aug 15, 2015 12:35 AM in response to greenmoo

Thank you greenmoo, this helped!! 🙂

Sep 25, 2015 8:36 AM in response to wjosten

thanks a lot, pal. 🙂

Sep 16, 2017 9:27 AM in response to Tom Gentry

Same problem with my iPhone 7 plus:( I have bak up from my iphone 4s when it was with dB and now it on 7 plus and I can't back to bars. Only dB.

Tried *3001#12345#* and go Home - nothing happened.

Tried *3001#12345#* and turn off- nothing

Does anyone have solved this problem on the iPhone 7 plus?

Nov 15, 2017 8:10 AM in response to a.moguchiy

Getting the signal strength number in place of your bars is not possible since iOS 10.3.1 but you can see the indicator by following this suggestion: iPhone Field Test Mode Signal Strength Indicator - YouTube.

HarisWHS

Level 1

4 points

May 30, 2017 2:59 PM in response to Tom Gentry

If you have iOS 10, when you enter field test mode, tap the -# to switch back to the dots.

Jun 4, 2017 7:08 AM in response to Tom Gentry

You can enter into test mode again then just hit the home button to exit without saving.

http://www.zdnet.com/article/how-to-activate-iphone-hidden-field-test-mode/

Jun 29, 2017 3:55 PM in response to Madentist

Having the same issue on my iPhone 7 Plus. It's been the same through three restores/ different iPhones. Any help would be awesome!

Jul 29, 2017 7:59 AM in response to greenmoo

Awesome!! This works!!

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Turn Off Field Test Mode