Nokia 3310: Secret Codes, Hidden Codes and Advanced Tricks — Complete Guide 2026
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The Nokia 3310 is the most iconic phone in history, but few people know that it hides a series of secret codes and advanced functions accessible directly from the keypad. This guide collects all verified codes — including those you won't find on the usual websites — to get the most out of your original 3310.
How to Display the IMEI Code
The IMEI code is the unique serial number of the Nokia 3310. It's used to identify the phone, block it in case of theft and verify its authenticity.
Sequence: *#06#
Type this sequence from the main screen (without pressing Call) and the 15-digit IMEI code appears automatically on the screen. Write it down and keep it in a safe place.
How to Display the Software Version
Sequence: *#0000#
The display shows three lines of information:
| Line | Meaning |
|---|---|
| First line (e.g. V 05.31) | Identification number of the software version |
| Second line (e.g. 20-03-2001) | Release date of the software version |
| Third line (e.g. NHM-5) | Code of the supported hardware model |
This information is useful to know whether the 3310 has the original firmware and to identify the exact model variant.
Warranty Codes — Manufacturing Date and Phone History
This is one of the most searched and hardest to find codes. It allows reading hidden information about the phone's history.
Sequence: *#92702689# (corresponds to the keys *#WAR0ANTY#)
After entering it, the phone enters a special menu with these entries:
- Serial Number — the physical serial number of the device
- Made — month and year of manufacture (e.g. 0900 = September 2000)
- Purchasing Date — purchase date, if entered (can be memorised but not subsequently modified)
- Repaired — date of last official repair, if carried out
- Transfer User Data — transfers address book data via infrared to other compatible models
- Life Timer — indicates total hours and minutes of conversation accumulated since the beginning of operation
Important note: to exit this menu you need to switch off the phone. It is not possible to return to the main menu by pressing a key.
The Made field is particularly useful for collectors: it allows verification of whether a Nokia 3310 is authentic and from which year it dates. The 3310s manufactured between 2000 and 2002 are the most sought after.
Enhanced Full Rate — Improving Call Audio Quality
The Nokia 3310 supports Enhanced Full Rate (EFR) mode, which significantly improves audio quality during voice calls where the network supports it.
To activate: *3370# → press Call
To deactivate: #3370# → press Call
After activation the phone restarts automatically. EFR mode slightly increases battery consumption but offers cleaner, clearer audio, especially in noisy environments.
Half Rate — Extending Battery Life
Half Rate mode reduces audio quality during calls but extends battery life. Useful when the charge is low and you need to save energy.
To activate: *4720# → press Call
To deactivate: #4720# → press Call
Here too the phone restarts automatically after activation.
SIM Lock Verification — Country Lock, Network Lock, Provider Lock
The Nokia 3310 can be locked to a specific operator (SIM Lock). These codes allow checking the lock status without opening the phone.
Base sequence: #pw+1234567890+n#
Where n indicates the type of lock to verify:
| Value n | Lock type |
|---|---|
| 1 | Country Lock |
| 2 | Network Lock |
| 3 | Provider Lock |
| 4 | SIM Lock (specific SIM) |
To type the + character, hold down the * key until the symbol appears. For p, hold * until p appears.
Warning: these codes only show the lock status. They do not unlock the phone. Attempting to unlock with incorrect codes can permanently lock the device after a certain number of attempts.
SIM Clock Stop — Further Reducing Energy Consumption
Sequence: *#746025625# (corresponds to *#SIM0CLOCK#)
This code checks whether the inserted SIM card supports the SIM Clock Stop function, which reduces energy consumption in standby by stopping the SIM's internal clock when not needed.
If the SIM supports this function, the 3310 activates it automatically and standby battery life improves noticeably.
Reset the Operator Profile
If the Nokia 3310 has incorrect network settings or cannot connect to the network, this code resets the default operator profile:
Sequence: *#7780#
Requires the security code (default: 12345). Clears operator settings but retains saved contacts and messages.
Full Factory Reset
For a complete reset that returns the phone exactly as it left the factory:
Sequence: *#7370#
Requires the security code (default: 12345). Deletes all data: contacts, messages, custom ringtones and settings. Use only when necessary.
Forgotten Security Code — What to Do
If you've forgotten the Nokia 3310 security code, first try the default code 12345 — many users never change it. If that doesn't work, the only solution is a reset via professional software (such as Phoenix or JAF), an operation that requires an original Nokia data cable and a PC. There is no universal code to bypass the security code via software.
Bonus Tricks: Useful Shortcuts
| Function | Key |
|---|---|
| Activate Silent profile | Hold # from the main screen |
| Quick access to phonebook | ↓ key from the main screen |
| Keypad lock | Menu + * |
The Original Nokia 3310 at Infosate
If you're looking for an original, verified and working Nokia 3310, Infosate offers a selection of authentic specimens from the 2000s, all tested before shipping. Each phone is checked with these same codes to verify its authenticity and actual condition.
👉 View the Nokia collection at Infosate
Do you have a Nokia 3310 and found a code that doesn't work? Write to us — our team verifies it on the physical model.