Motorola Secret Codes *#06#- Serial No IMEIMenu+# Phone NumberNumber+#-Speed Dail*#**372# Or *#**376#-Listen FM without earphonesThere 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.More 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
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