C820, C825, C700, C701, C707, C717, Elle-N3 set language to English: *#0044#
C820, C825, C700, C701, C707, C717, Elle-N3 set language to Russian: *#0007#
C820, C825, C700, C701, C707, C717, Elle-N3 set language to French: *#0033#
E101, E207 software version:    *#4837*#
E101, E207 auto call test:          *#2255*#
E101, E207 memory status:       *#6362*#
E101, E207 reset menu:            *#7378*#
S520 factory mode:                  *#3228#
S520 engineer mode:                *#364463#
S520 software version:             *#837#
S520 auto test:                         *#2886#
S520 clean test records:            *#3872#
S520 restore default settings:     *#73738#
S520 something unknown:        *#200709*01#

MASTERCODES:
Alcatel HD1, HE1: 25228353
Alcatel BE1,  BE3: 25228352
Alcatel BE4,  BE5: 83227423

*#06#                 Show IMEI & SW version
000000*               Entering in Engineering Menu1 (with SIM)
###874#             Reset to Factory Defaults (with SIM)
###765*02#        Add Barring Groups
###765*05#        Locking to Network
###765*07#        Unlocking from Network
###765*08#        Erase Network
###765*78#        Deactivate Barring Groups
0123456789        Menu2 Code - BE4 Menu2 - turn long CALL in Maenu1

*#0048#         Fast change language (Polish)
*#0049#         Fast change language (Deutsch)