George Zhu’s BLOG

Any command can be preceded by *#, ** or ##.

*# is INTERROGATION.
** is SETUP.
## is CANCEL / DELETE.

*#5005*78283#           This dumps a baseband log in /Library/Logs/Baseband/ - Note 1
**5005*78283#           This dumps a baseband log in /Library/Logs/Baseband/ - Note 1
##5005*78283#           This dumps a baseband log in /Library/Logs/Baseband/ - Note 1
*#5005*62#              "Error performing request - No Network Service" - Note 2
*#5005*62255#           "Error performing request - No Network Service" - Note 2
*#5005*87223#           "Error performing request - No Network Service" - Note 2
*#5005*86#              Displays the Voice Mail dial-in number.
**5005*86*VOICEMAIL#    Sets the Voice Mail number to VOICEMAIL (international format).
##5005*86#              Erases the Voice Mail number from phone.
*#5005*7672#            Display the SMSC Setting. 
**5005*7672*SMSCNUMBER# Sets the SMSC to SMSCNUMBER (international format).
##5005*7672#            Erases the SMSC number from phone.
*#5005*22#              "Error performing request - No Network Service" - Note 2
**5005*22#              Unknown. Displays "Please wait"; returns to dialpad - Note 2
##5005*22#              Unknown. Displays "Please wait"; returns to dialpad - Note 2
*#5005*5264#            This reads LANG and tells you the "actual language" (en).
*#5005#                 "Error performing request - No Network Service" - Note 2
##5005*22*12345678#     Function unknown, displays "please wait"...; power-off to exit

Note 1:
It may be necessary to change the prefix from the set of (*#, **, ##) to initiate a new log dump.  The logs are not “tail” able, since this is a single dump, with no additional data written.  So far, these logs appear to always remain the same size.  Logfiles are stamped with the current date.

Note 2:
These tests were performed with a stock phone on the AT&T network.  It is possible that these errors represent debugging features that are only available on a special debug cellular base-station (CONJECTURE only!)’