Motorola cell phone secret codes

Below are some secret codes for Motorola cell phones:
IMEI number: *#06#
Lock keys: *7
Select phone line – (to write 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 []
Note: [] (pause) means the * key held in until box appears.
You can change GSM frequencies to 900/1800 by entering the enginnering model:
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 to your Motorola C350 C450 C550 or C650, press menu button, press 048263* quickly, then on the popup menu enter 47 and press OK, press 50 and OK, press 1 OK, press 64 OK, press 1 OK, press 186 and OK. Then you will receive an extra 50 MSGs memory space. Switch phone off and back on.