Here are some common codes to access the programming menu or field test menu of popular cell-phones. I've been able, for instance, to change the banner on my old Nokia 6185 phone (You can't do it using the user menus). I bet many other goodies can be found with a little bit of experimentation.

If you don't find your exact model, try a close model.

NOTES:

  1. A "&" means "hold while entering"
  2. A "," separates each step or key.
  3. A "/" separates keys used for storing, incrementing and exiting.
  4. Parentheses "()" used in the ACCESS column indicate state phone must be in, ie: (locked), if no state is indicated phone is in normal user mode.
  5. Many phones must have the access code entered within ten seconds of power up.
  6. Parentheses "()" used in the KEYS column indicate other keys that may be needed, ie: (SND T) indicates that the SND key toggles.

    MAKE/MODEL         ACCESS CODE           KEYS USED TO STORE/INCREMENT/EXIT
    --------------------------------------------------------------------------
    
    ANTEL STR 300..    04049 FCN FCN                  SEND/SEND/END
    ANTEL STR 1100..   M 310 #                        STO/STO/END
    ALPINE             (LOCKED) #626#7764726..*..     STOR/STOR/SEND
    ARA                CLR & 923885                   S/S/END
    ASTROTEL           END,RCL,FUNC,CLR,SND,08693427  #/*/END
    AT&T 1710          FCN,626,RCL                    DOWN/DOWN/FCN,626,STO
    AT&T] 3000..        RCL & MENU, *62729854#         STO/VOL/CLR
    AUDIOVOX BC/CMT    LOCK CODE,FUNC,#,1             STO/#/FUNC,SND,FUNC,CLR
    AUDIOVOX PR125     MUTE,626#7871300,RCL           UP ARROW/UP ARROW/STO,END
    CELLQUEST          (LOCKED) FUNC, #626#, FUNC     SND/SND/END,FUNC,END
    CLARION            CLR,**123123##                 RCL,N,STO/POWER OFF
    CMT                (LOCKED) *5965 OR *4018        SND/VOL UP & DWN/END
    COLT TP832         (LOCKED) FUNC, #626#, FUNC     SND/SND/END,FUNC,END
    D_TEL 50-55,92,95  CLR & 8291112                  SND/SND/END
    D_TEL 60-80        CLR & 6926232                  SND/SND/END
    D_TEL 90,99,200    CLR & 6972814                  SND/SND/END
    D_TEL 22X          END & 6972814                  SND/SND/END
    D_TEL M14          CLR & 8291112                  SND/SND/END
    ERICSON POCKET     923885, FUNC, FUNC             VOL UP/VOL UP/END
    FUJITSU            (LOCKED) #626#7764726..*..     STOR/STOR/SEND
    GEN-ELEC MOBILES   CL & 923885                    S/S/END
    GEN-ELEC MINI      CL & 7591122                   SEND/SEND/END
    GEN-ELEC MINI 2    END & 6282905                  SEND/SEND/END
    GEN-ELEC POCKET    FUNC & 923885                  VOL UP/VOL UP/END
    GOLDSTAR GM5000    FCN,99*,1234567890,MEM         MEM/MEM/MEM
    HITACHI CR1111H    FCN,626,RCL                    UP.DWN/UP.DWN/FCN,626,STO
    HITACHI CR2111H    OPT,626,RCL                    UP.DWN/UP.DWN/OPT,626,STO
    INFA 3000          FCN,FCN,*971626*               #/VOL UP.DWN/FCN END
    MEI CT3000         12358*0#980#                   */*/END
    MEI HT5000         (ADAPTOR)                      RCL/MUT.SND/END
    MITS 555,560,600   STO & 5474432                  SEND/SEND/END
    MITS 700           CLR & 3111917                  SEND/SEND/END
    MITS 800,1200      STO & 5474432                  SEND/SEND/END
    MITS 900,3000,4000 END & 6972814                  SEND/SEND/END
    MITS 1500,800      CLR & 5474432                  SEND/SEND/END
    MOBIRA ME53A       (ADAPTOR) 01#,48#              STEP#,DATA,*/*,02#
    MOBIRA ME57,300    *21057#12345*,01#,48#(49# READS) STEP#,DATA,*/*,02#
    MOBIRA TPA & THA   MENU,FCN,NEXT,OK,FCN,NEXT,OK,*21057#12345
                                                      OK/NEXT/FCN,CLR
    MOTOROLA           SEE TEXT
    NEC (MOST)         (ADAPTOR) RCL#01,RCL#71        #/#/CLR,RCL#02
    NOKIA LX11 & M11   *3001#12345,SEL,9,END          END(SND T)/END/SEL,CLR
    NOKIA M10,TC2000   *17*3001*1234(OR LOCK CODE)*   SEL/SEL/SEL,END
    NOKIA P3/4/6000,PT *3001#12345,SEL,9,END          END(SND T)/END/SEL,CLR
    
    NOKIA 101/1000     *3001#12345,STO,00             RCL02..,STO02../POWER OFF
    NOKIA P30,TC1000   *17*1003*12345*                SEL/SEL/SEL,END
    NOVATEL 8000'S     FCN,LOCK,#259                  SND(SND T)/VOL/END
    NOVATEL 8320       (FULL LOCK)#259                SND(SND T)/VOL/END
    NOVATEL 8325       (FULL LOCK)255(OR 266)#510*    SND(SND T)VOL/END
    NOVATEL PTR800     FCN, FCN, *626776*             #/VOL/FCN
    NOVATEL PTR825     FCN, FCN, *697201*             #/VOL/FCN
    OKI 200,300,400    END,RCL,FNC,CLR,SND,08693427   #/*/END
    OKI 610,620        FCN & RCL, 0008693427          */VOL/CLR
    OKI 630,700        MENU & RCL, 0008693427         STO/VOL/CLR
    OKI ACC91          ANY 2 KEYS, 0008693427         NEW CALL/VOL/CLR
    OKI 750,21,23      * & #,*74646952#               STO/VOL/CLR
    OKI 810, 890, 910  RCL & FCN, *12345678#          STO/VOL/CLR
    OKI 830, 892, 900  RCL & MENU, *62729854#         STO/VOL/CLR
    PANASONIC EB/TP/HP (ADAPTOR)*0000#,*1 SND         RCLxx/STOxx/STO**
    PANASONIC EB/EF/EZ (ADAPTOR)*0000#,*1 SND, 50 SND RCLxx/STOxx/STO**,END
    PANASONIC HH/CM/TF *0#0*0#0*1, FCN, ALPHA         RCLxx/STOxx/STO**,END
    PIONEER (ALL)      SEE MOTOROLA
    QUANTUM MICRO      47*869#08#9                    STO/STO/END
    RADIO SHACK:
    17-1002/1003       SPECIAL HANDSET REQD           SEE RSHACK01 & 02
    CT102/302/1030/1033/350
                       *3001#12345,SEL,9,END          END/(SND T)/SEL,CLR
    CT100/101          *17*3001*1234(OR LOCK CODE)*   SEL/SEL/SEL,END
    CT200/201          *17*1003*1234(OR LOCK CODE)*   SEL/SEL/SEL,END
    CT300/301          *17*1003*12345(OR SEC CODE)*   SEL/SEL/SEL,END
    CT8003             (OFF)*&#(ON)51609891           STO/x/SEND,END
    SANYO CMP310       MUTE, 310#, 2567252, RCL       UP ARROW/UP ARROW/END
    SHINTOM 8000..     (LOCKED) FUNC, #626#, FUNC     SND/SND/END,FUNC,END
    SONY CMP11         (ADAPTOR) 5931 FCN STO, 0, 1   STO/STO/END
    SUN MOON STAR      FCN FCN *950626*               #/UP ARROW/FCN,END
    TECHNOPHONE:
    PC 105/115/125/135 SECURITY CODE REQD             SEE TECNO01/02/03/04 FILES
    MCA905/985/995     #000000##953739# STO 99 STO STO
                       (OFF THEN ON) NAMx *           */*/SEND
    MC915A             #000000##953739# STO 29 STO STO
                       (OFF THEN ON) NAMx *           */*/SEND
    UNIDEN CP5500      (OFF)*&#(ON)32218591           STO/x/SEND,END
    USA CORP A         CLR & 6926232                  SEND/SEND/END
    USA CORP B         CLR & 4472866                  SEND/SEND/END