I. Using the IMEI code test, enter "* # 06 #" on the Nokia phone, "* # 06 #" display 15 digits of mobile phone serial number, it is the "ID number" of the mobile phone, the professional term is called IMEI production, namely it is called "International Mobile Equipment Identification Code" (as shown below): XXXXXX XX XXXXXX X TAC FAC SNR SP Tac = Approval Number (6) FAC = Final Assembly Code (2 Bits) SNR = Sequence Number (6) SP = Alternate (1) Nokia mobile phone production area code (FAC) 10 Finnish 20 Germany 30 South Korea 40 Beijing 60 Guangdong Province Dongguan City, China Show mobile phone information: In the fuselage "* # 92702689 #": 1.serial no: (* **), ie IMEI production site 2.made: (mobile phone manufacturing date) 3.purchasing date: (Purchase date) You can enter the purchase date yourself, MMYY is the month, and once this option is entered, you can't change it again. . So, when buying a mobile phone, if you find this record, this machine must be old! 4.Repaired: (Repair Date) 5.Transfer User Data? (Change the user date) If the above work is not working properly, and the phone wants to have a legitimate code, try: 6232 (OK): Show the Moon and Year of the Manufactured 7332 (OK): Show recent maintenance date 7832 (OK): Show mobile phone purchase date 9268 (OK): Display Series No. 37832 (OK): Setting the purchase date month (Warning: Allow once) 87267 (OK): confirm After transferring the above information, you need to turn off the phone and turn the phone again. Three mobile phone full rate encoding: "* 3370 #" or "* efr #": Open (EFR) full rate encoding "# 3370 #" or "# EFR #": Close (EFR) full rate encoding "* 4720 #" or "* Hra0 #": Open (HR) half rate encoding "# 4720 #" or "# HRA0 #": Close (HR) half rate encoding in enhances full rate, there is increased, but power consumption is 5