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Tom Gentry Author

Level 1

8 points

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

54 replies

Jul 18, 2010 7:06 PM in response to JPBOSS

This I can answer . He specifically described in his first article. He set up the phone 3gS with 3.1.3 in Filed Mode and in DBm display. Then set Up Iphone 4 as a New Phone and the restore from the back up from 3GS where he set up DBm display

JPBOSS

Level 1

79 points

Jul 18, 2010 7:19 PM in response to Michael Empire

Thanks Michael.

MichaelEmpire wrote:
This I can answer . He specifically described in his first article. He set up the phone 3gS with 3.1.3 in Filed Mode and in DBm display. Then set Up Iphone 4 as a New Phone and the restore from the back up from 3GS where he set up DBm display

EBSkater

Level 2

496 points

Jul 18, 2010 7:47 PM in response to Michael Empire

Actually, he mentions that he jailbreaks his iPhone on 3.1.3, which is inaccurate. You don't need to jailbreak to obtain the dB meter.

Jul 18, 2010 7:53 PM in response to EBSkater

Being even More exact he mentioned he was using SBsettings and this is the reason he jailbreak it first. I think using the Field Mode will bring to the same result.

http://www.anandtech.com/show/3794/the-iphone-4-review/2

EBSkater

Level 2

496 points

Jul 18, 2010 7:55 PM in response to Michael Empire

I just think it's pointless to have a jailbreak on the iPhone, in my opinion.

Either way, he made it sound like you HAVE TO jailbreak to get the dB meter.

Jul 18, 2010 8:30 PM in response to EBSkater

He also wanted his WI Fi to be DBm. This was the point and he was always using SBsettings. He never used Field Mode.

EBSkater

Level 2

496 points

Jul 19, 2010 12:01 PM in response to Michael Empire

As I stated, "Either way, he made it sound like you HAVE TO jailbreak to get the dB meter. " It makes it seem to the average reader who doesn't know anything, that you HAVE TO jailbreak in order to get the dB Meter.

Sep 13, 2010 4:56 AM in response to MauiGeist

*Give applepup a beer*. This seems to really disable the Field Test settings without hurting your data. All I had to do was reset my background image and WiFi settings after.

ecallow

Level 1

5 points

Aug 13, 2012 2:55 AM in response to Tom Gentry

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!

KiltedTim

Level 10

205,468 points

Aug 13, 2012 4:22 AM in response to ecallow

Congratulations on reviving a thread that's been dormant for almost 2 whole years.

greenmoo

Level 1

9 points

Sep 24, 2012 6:35 PM in response to Tom Gentry

I know I am a few years late but I had this problem on my phone and I fixed it.

I activated FTM on iPhone 4 iOS 5.1 and upgraded to iOS 6 and couldn't turn it off .. So this is what I did..

DO NOT DIAL THE CODE MANUALLY. Open "Notes" and create a new note, type *3001#12345#*, then copy it.

Open Phone, dialpad and PASTE the code then press CALL. Once you enter Field Test Mode, press the db to return back to signal bars and press and release (do not hold) the Home button.

This fixes this bloody problem once and for all.

Cheers!

Ramzy

Level 1

10 points

Nov 21, 2012 5:43 AM in response to greenmoo

@KiltedTim - Congratulations on being a useless waste of bandwidth. This is an issue that still exists, since the iPhone 3G. Why start a new thread if all the troubleshooting has been done already? Last I checked you aren't moderating Apple's forums nor are you covering their bandwidth costs.

@greenmoo - Thank you so much for this. I've been running FTM since my 3GS. It has lasted through each restore since the iPhone 3GS, 4, 4S, and now the 5. Your method fixed the issue.

I don't have a problem with FTM, my main gripe is the fact that it switches between modes randomly between apps, which requires you to constantly tap on it to set it back to dB rather than bars.