IMEI number: *#06# Code to lock keys. Press
together *7
Note: [] (pause) means the *
key held in until box appears.
Select phone line - (use this to
write things below the provider name): [] [] [] 0 0 8 [] 1 [] Add phonebook to main menu: [] [] [] 1 0 5 [] 1 [] Add messages to main menu: [] [] [] 1 0 7 [] 1 [] Copy SIM memory (phonebook
menu): [] [] [] 1 0 8 [] 1 [] Eng Field options (main menu): [] [] [] 1 1 3 [] 1 [] Slow (Frequency of search
menu): [] [] [] 1 0 1 [] 1 [] Medium (Frequency of search
menu): [] [] [] 1 0 2 [] 1 [] Fast (Frequency of search
menu): [] [] [] 1 0 3 [] 1 [] Enable EFR: [] [] [] 1 1 9 [] 1 [] Function : [] [] [] # # # [] 1 [] Change pin: [] [] [] 0 0 4 [] 1 [] Unblocking using the "puk"
number: [] [] [] 0 0 5 [] 1 [] There are lots of similar codes
exist. If you change the last
number to 0 you can deactive
that code. The 3 digit number
at the middle are from 0 to
999. I put the most interesting codes. (EFR):Enhanced Full Rate
Codec.
You can change GSM frequencies
to 900/1800 by entering the
enginnering model. Following the
below steps: enter menu and press 048263*
quickly, then you will enter the
secret engineering menu
under "Opcode"
input 10*0*3 for GSM 900
10*0*4 for GSM 1800 10*0*5 for GSM 1900
10*0*6 for dual band GSM
900/1800
10*0*7 for dual band GSM
850/1900
To add extra message space 4 your Motorola C350 C450 C550
or C650, press menu button,
press 048263* quickly, then on
the popup menu enter 47 press
ok.press 50 and ok.press 1
ok.press 64 ok.press 1 ok.press 186 and ok.You will receive an
extra 50 msgs memory
space.Switch phone off and back
on.(not tested)
