iOS 4 Field Test Mode?

Discussion in 'iPhone' started by Squid7085, Jun 19, 2010.

  1. Squid7085 macrumors 6502a

    Aug 14, 2002
    Charlotte, NC
    Hello all, I have searched high and low, but I can't seem to find a thread, or anything on the internet for that matter about the Field Test mode in 4.0. I have been using 4.0 since the Beta, and the standard "*3001#12345#*" thing hasnt worked in any of them. I chalked it up in the Betas to the fact it was, well, a beta, but in the GM, it still does not work. Do you think Apple changed the code, or am I just missing something.
  2. Sysxp macrumors newbie

    Jun 20, 2010
    Running iPhone 3gs iOS 4 GM and found the same problem - can't access the "Field Test" menu. When you type *#3001*12345*# and press "Call" - nothing happens.

    Looks like that is absent for some reason.
    I cant find it in ./Applications/

    Can somebody please share his from the older firmware?
    Or any other solution to make "FieldTest" work?
  3. gikku macrumors regular


    Dec 29, 2006
    bump. same issue here. :)
    *3001#12345#* no longer activates, .app gone?
  4. Sirobin macrumors 6502


    May 6, 2008
    Same issue. Pretty weird, I wonder why they removed it?
  5. thelatinist macrumors 603


    Aug 15, 2009
    Connecticut, USA
    There is no field test app in 4.0. I'm sure they removed it because they didn't want people seeing details of the network.
  6. zephxiii macrumors 6502

    Jun 21, 2010
    Blah, we need to find a way to get fieldtest back.
  7. silveralesis macrumors newbie

    Jun 21, 2010
    The *3001#12345#* code doesn't work, but I took off the last *, it said "USSD Test response. Hi!". The only option after that is to "Dismiss".

    I would love to know what my actual signal is.
  8. zephxiii macrumors 6502

    Jun 21, 2010
    ironically I have db readings for both cellular and wifi after upgrading to os4 lol.
  9. Squid7085 thread starter macrumors 6502a

    Aug 14, 2002
    Charlotte, NC
    Well, at least I know Im not the only one anymore. Lol. Thats a bummer, seems like a pretty stupid thing to remove, not like it hurt anything. I just want the dB levels back...
  10. zephxiii macrumors 6502

    Jun 21, 2010
    Hey you know I actually had db readings after I upgraded, but I was 3.1.3 jb before the upgrade. My mms was broken though so I had to do a factory restore. You might be able to get db readings back when jb becomes available.
  11. silveralesis macrumors newbie

    Jun 21, 2010
    Potential solution?

    I heard that some people have been able to toggle back and forth from bars to db by tapping the bars in the upper left hand corner. I, however, have not had such success with my 3GS after updating to i0S4.
  12. nooaah macrumors 68000


    Sep 3, 2009
    Philadelphia, PA
    Perhaps because you backed up/restored from a previous jailbreak?
  13. CSMchris376 macrumors regular

    Mar 13, 2010
    iPhone 3G

    I have an iPhone 3G and just installed iOS4 yesterday. I had the field test activated on mine, and now that I have iOS4, it is still there. My phone is not JB, it is stock.

    My question is; Is there a way to disable the field test mode? Sometimes it displays Db, sometimes the bars, I can toggle the bars off and on, but each page I go to it differs. Any suggestions?
  14. McBeresford macrumors 6502


    May 31, 2005

    I thought this thread deserved a good bump. Makes me wonder if Apple did in fact know about the reception issues...

    The plot thickens...
  15. extrachrispy macrumors regular


    Jul 29, 2009
    Austin, Texas
    Initially, mine behaved that way, too. Eventually, I stopped worrying about it, and it seems to have settled on dB, which is perfectly fine with me. I'm a geek--I want the numbers, not "bars."
  16. aneagle macrumors newbie

    Jul 27, 2010
    Good News: FieldTest on iOS4

    I did this:
    -copy from var/stash/Applications of 3.1.2 to var/stash/Applications of iOS4
    -copy fieldtest.plist, fieldtest68.plist and specialkeys.plist from System/Library/PrivateFrameworks/CoreTelephony.framwork/Support of 3.1.2 to System/Library/Frameworks/CoreTelephony.framwork/Support of iOS4

    *3001*12345#* Call now shows the FieldTest pages.

    I put an icon.png into and delete the last key of its info.plist to make FieldTest icon shown on the screen.

    PS. The correct code should be *3001#12345#*
  17. edogyip macrumors member

    May 26, 2009
    Can you upload a pic of this please?
  18. aneagle macrumors newbie

    Jul 27, 2010
    Here's one of the pages

    Attached Files:

  19. aneagle macrumors newbie

    Jul 27, 2010
    I think you can try the way I did on iOS4 GM

    Attached Files:

  20. midnight1111 macrumors newbie

    Feb 28, 2009

    I want to do this on my iphone 4... i need help getting the files. how does one copy them thx alot
  21. aneagle macrumors newbie

    Jul 27, 2010
    You need Diskaid or Phoneview or other tools, you can also install the deb fileFieldTest_iOS4-v1.deb, but the phone needs to be JB first.
  22. anng12 macrumors member

    Jul 25, 2009
    Can somebody show me how to get these files on my i4?
  23. macse30 macrumors regular


    Jul 30, 2009
    Thanks aneagle. I downloaded the files and installed them per your instructions, but still no go. Before, it would do nothing when I pressed the call button after entering the number. Now, it looks like it tries to swing in another page but it quits right away and goes to home. The FieldTest app is there. It starts to open a page when I click on it but crashes back to home right away. Any ideas?

    iPhone3GS 4.0.1 JB with

  24. macse30 macrumors regular


    Jul 30, 2009
    Got it!!!

    I used mobileterminal with su root and cd to the Applications folder then:
    chmod -R -v 755

    excellent work, aneagle!
  25. moussekateer macrumors 6502a


    May 12, 2009
    Or you can go for the much easier option and install Strength from Cydia.

Share This Page