MOTOROLA TRICKS & CODES

Code to lock keys. Press together *7Note: [] (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 menuunder "Opcode"input 10*0*3 for GSM 90010*0*4 for GSM 180010*0*5 for GSM 190010*0*6 for dual band GSM 900/180010*0*7 for dual band GSM 850/1900To 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)