*#06# > displays imei
*#300# ok > list the software & hardware version
*#301# ok > full keypads functional test
*#303# ok > set default language to english
*#304# ok > set off engineering mode
*#304*19980722# > set ON engineering mode
*#305# ok > location: 1 OK
*#307# ok > Engineering test mode
*#311# ok > phone code changed to default code
*#400# ok > ADC, cal val*
*#402# ok > adjust display intensity/contrast
*#403# ok > list the manufacturing informations
19980722 ok > master unlock code for phone & sim lock
*#302# ok > acoustic test*
*3370# > enhanced full rate
#3370# > deactivate enhanced full rate
*#72837726# ok > confirm?, data saved
1234 Ok phone code default
*#0000# ok > settings saved,restore set phone to default languange
*#300# ok > list the software & hardware version
*#301# ok > full keypads functional test
*#303# ok > set default language to english
*#304# ok > set off engineering mode
*#304*19980722# > set ON engineering mode
*#305# ok > location: 1 OK
*#307# ok > Engineering test mode
*#311# ok > phone code changed to default code
*#400# ok > ADC, cal val*
*#402# ok > adjust display intensity/contrast
*#403# ok > list the manufacturing informations
19980722 ok > master unlock code for phone & sim lock
*#302# ok > acoustic test*
*3370# > enhanced full rate
#3370# > deactivate enhanced full rate
*#72837726# ok > confirm?, data saved
1234 Ok phone code default
*#0000# ok > settings saved,restore set phone to default languange