General Nokia Secret Code Collection, see the replies for support! *#06# Check IMEI number, applicable to all phones *#7370# Format phone, Series 60 phones only *#7780# Restore factory settings, applicable to Series 60 and Series 40 phones *#0000# Check current software version, applicable to all phones *#7760# Check production line number, Series 40 phones only *#2820# Check Bluetooth device address, applicable to Series 60 and Series 40 phones *3370# Activate EFR, available for certain phone models #3370# Deactivate EFR, available for certain phone models *4720# Activate HFR, available for certain phone models #4720# Deactivate HFR, available for certain phone models *#92702689# Check total call time, only for 6630 *#92702689# Enter data mode, Series 40 phones only *#7370925538# Lock the phone, Series 60 phones only 1. *#06#: Displays IMEI code 2. *#0000#: Displays software version (if it does not work for some models, you can use *#model code#, e.g., *#6110#) First line - software version; Second line - software release date; Third line - phone model 3. *#92702689#: Displays serial number and IMEI with scrollable menu Screen 1 - Phone manufacturing date: 1197 (MMYY); Screen 2 - Serial number and IMEI; Screen 3 - Purchase date: 1197 (MMYY), can be changed once (once entered, it cannot be changed again, date will be permanently recorded) Screen 4 - Last repair date: 0000 (MMYY), set during repair. Screen 5 - Transfer user data: Exit to turn off phone, then return.If the above functions do not work properly, and the phone asks you to enter a valid code, you can try the following:
1) *6232 (ok): Displays the month and year of manufacture
2) *7832 (ok): Displays the month and year of phone purchase
3) *7332 (ok): Displays the month and year of the most recent repair: 0000 (MMYY) set during repair
4) *9268 (ok): Displays the serial number
5) *37832 (ok): Sets the month and year of purchase (Warning: only allowed once)
6) *87267 (ok): Confirm transmission, related to software update
IV. Rate Coding
*3370# or *efr#: Turn on (efr) full rate coding
#3370# or #efr#: Turn off full rate coding (Enables full enhanced coding mode, which can improve voice quality but will *)
*4720# or *hra0#: Turn on (hr) half rate coding
#4720# or #hra0#: Turn off half rate coding (Voice quality will decrease, but battery life can extend by about 30%, network support required)
After entering these codes, the phone will shut down and restart for the changes to take effect.
V. SIM Card Lock Information
*#746025625# (=*#sim0clock#): If the SIM card can be locked, entering this command during detection will display "sim clockstop allowed" or "sim clockstop not allowed" on the phone, depending on your SIM card.
SIM card lock information: Includes four different types of locks
1) Country lock – locks to a specified country
2) Network lock – locks to a specified network
3) Operator lock – locks to a service provider
4) SIM card lock – locks to a specified SIM card
VI. Check if the phone is network-locked
First, you must identify the keys that must be used to configure the phone. Among them, pressing the * key twice in a row will display "+"; pressing it three times will display "p"; pressing it four times will display "w". Then, you can enter the corresponding combination keys in order.
#pw+1234567890+1#: Check if the country code is locked
