1. crav4speed's Avatar
    I remembered using the field test app on my L920 to force the phone into 3G only mode since AT&T took out the option to change them manually in the settings. I was not too happy when they removed Field Test Mode. I tried it on the L1520 and lo and behold, Field Test is back!! Some short codes that I tried and work on the phone are below. Also, I'm not responsible if you break, damage or brick your phone and all that good stuff

    Field Test: ##3282#

    Color & Lifetime Counter: ##646#

    Sim Lock Status: ##7820#

    Tier3 Status: ##4678255# (I have no clue what this is. Something about installed apps.)


    These were all taken from this thread over at XDA

    WP8 Diagnostics and Hidden Apps Thread - xda-developers
    12-09-2013 08:14 PM
  2. Dave Blake's Avatar
    Nice find thanks for posting this.
    12-09-2013 09:21 PM
  3. Rasahi's Avatar
    Have you tried field test on lumia 1520 global version?
    01-09-2014 06:55 AM
  4. Allan Cantillo M's Avatar
    I tried in my RM-937 yellow and the only one that works is the Tier3 Status: ##4678255# . It lists several miniupdates with some "guids" and some other nokia software like Nokia Care, Transfer my Data and so on.
    I really need the Field Test: ##3282#. Without it my cell phone almost has never good internet connection. (I experienced the same in my previous Lumia 900 and the field test to lock to 3G worked smoothly after months of pain)
    02-03-2014 11:08 AM
  5. Rasahi's Avatar
    I tried in my RM-937 yellow and the only one that works is the Tier3 Status: ##4678255# . It lists several miniupdates with some "guids" and some other nokia software like Nokia Care, Transfer my Data and so on.
    I really need the Field Test: ##3282#. Without it my cell phone almost has never good internet connection. (I experienced the same in my previous Lumia 900 and the field test to lock to 3G worked smoothly after months of pain)
    Try here, http://forums.windowscentral.com/win...8/239028-2.htm others it works but not for me. If it works for you please let me know.
    02-04-2014 08:47 AM
  6. kramnod's Avatar
    can you tell me your product code of the 1520 that your using? its normally on the micro sd card slot i believe...
    08-09-2014 12:32 PM
  7. Rasahi's Avatar
    What is product code. Or that MEA?
    08-09-2014 12:57 PM
  8. kramnod's Avatar
    at crav4speed

    can you tell me your product code of the 1520 that your using? its normally on the micro sd card slot i believe...
    08-09-2014 01:10 PM
  9. kramnod's Avatar
    its the origin of the rom... it will tell us from which country and region that rom is.. Product type is RM-937.. Product code can be found on the sim tray or sd card
    08-09-2014 01:15 PM
  10. crav4speed's Avatar
    at crav4speed

    can you tell me your product code of the 1520 that your using? its normally on the micro sd card slot i believe...
    Sorry for late reply...

    AT&T Version RM-940 1520.2
    08-20-2014 01:21 PM
  11. Nimdock's Avatar
    Unfortunately ##3282# doesn't work on my 1520.3 running Cyan with 8.1 Update 1. I am really interested in measuring the signal strength inside my apartment.
    08-20-2014 01:49 PM
  12. Purge_GT's Avatar
    Me too - ##3282# or any variant with asterisks does not give me the menu.

    Any ideas? RM-937 1520 (HK import to Canada)
    09-21-2015 02:28 PM

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