Nokia phones have always been popular for their simplicity, reliability, and hidden features.
Older Nokia handsets, especially classic GSM and Symbian models, also included a number of useful service and diagnostic codes.
Some codes display information about your phone, while others open diagnostic or network-related functions.
Keep in mind that not every code works on every Nokia model because Nokia used different operating systems, firmware versions, and hardware platforms over the years.
Here are some useful Nokia and GSM service codes.
1. *#0000#
Displays software or firmware information on supported Nokia phones.
This is one of the most famous Nokia codes.
On compatible models, it can display the software version and related information.
2. *#06#
Displays the phone's IMEI number.
IMEI stands for International Mobile Equipment Identity.
Your carrier or manufacturer may ask for the IMEI when troubleshooting or identifying a device.
Tip: Do not publicly post your complete IMEI.
3. *#9999#
Alternative software-version code on some older Nokia phones.
This is mainly associated with legacy devices.
4. *#92702689#
Opens service information on some classic Nokia phones.
Depending on the handset, the screen may contain information related to service or usage history.
5. *#7780#
Resets certain phone settings on supported models.
The exact behavior depends on the device.
Back up important information before using reset-related commands.
6. *#7370#
Performs a deeper software reset on some Symbian Nokia phones.
This can erase user information.
Do not use it casually.
7. *#2820#
Displays Bluetooth-related device information on some older Nokia phones.
Useful when troubleshooting Bluetooth connections.
8. *#62209526#
Displays the WLAN/MAC address on supported Nokia models.
The MAC address identifies a network interface.
9. *#43#
Checks call-waiting status on compatible GSM networks.
The result depends on your network operator.
10. *#21#
Checks unconditional call-forwarding status.
This is a network service code rather than a universal Nokia hardware feature.
11. *#61#
Checks call forwarding when there is no answer.
It can show how unanswered calls are handled by the network.
12. *#62#
Checks call forwarding when the phone is unreachable.
This can apply when the phone is switched off or outside network coverage.
13. *#67#
Checks call forwarding when the line is busy.
The response depends on the carrier.
14. *#30#
Checks Calling Line Identification presentation.
Availability depends on network support.
15. *#31#
Checks certain caller-ID restriction settings.
The behavior can vary between networks and devices.
16. *#33#
Checks certain call-barring information.
This is associated with GSM supplementary services.
17. *#5005*7672#
Checks the SMS service-center number on some GSM-compatible devices.
This can be useful when troubleshooting SMS problems.
18. *#746025625#
Checks SIM clock-stop support on certain older devices.
This is a legacy GSM code and is unlikely to work on modern phones.
19. *#67705646#
Removes the operator logo on certain old Nokia models.
This is a classic legacy Nokia feature.
20. *#73#
Provides access to certain configuration functions on some older Nokia phones.
The result depends heavily on the model and firmware.
21. *#2640#
Displays security-related information on some legacy Nokia models.
It is not universally supported.
22. *#3283#
Provides certain usage or configuration information on compatible older phones.
Different models may return different results.
23. *#8110#
Displays software information on some older Nokia devices.
Compatibility varies.
24. *#335738#
Provides access to certain configuration or network-related information on some legacy Nokia models.
Again, this is model-dependent.
25. *#92702689#
Opens the service information screen on supported classic Nokia phones.
This code appears frequently in classic Nokia service-code lists.
26. *#06#
Displays the IMEI number.
It is worth including because it remains one of the most widely recognized GSM service codes.
Why Nokia Codes Don't Always Work
Don't worry if a code does nothing.
Nokia produced phones using many different platforms, including:
• Classic proprietary systems.
• Series 30.
• Series 40.
• Symbian.
• Windows Phone.
• Android.
A code designed for an older Series 40 phone may not work on a modern Android Nokia handset.
Carrier support can also affect network-related codes.
Be Careful With Reset Codes
Some codes can change settings or erase information.
Before trying an unfamiliar code:
1. Check your exact model.
2. Back up important files.
3. Understand what the code does.
4. Avoid reset commands unless necessary.
Final Word
Nokia service codes are an interesting part of mobile-phone history.
They can help users check information such as software versions, IMEI details, Bluetooth information, network services, and diagnostic information.
The most important rule is simple: a code that works on one Nokia model does not mean it will work on another.
Always verify compatibility before experimenting with service or reset codes.