I'd like to write, that I'm not professionally connected with any cellular network or phone company. This NetMonitor guide is based on many different materials and exists thanks to the support of many different people (see Information sources). This is a guide made by user. It may lack description to some functions or contain errors and mistakes (resulting from wrong translation or my ignorance) and some strange expressions. Many questions remain unanswered. Furthermore, this page is still "under construction". Encouraging, isn't it? But that's the (sad) true: Nokia doesn't make appropriate materials available... I can only assure you, that I do my best to make this NetMonitor description as reliable and complete as possible.

In this moment on my homepage you can also find Polish version of this FAQ. English language version was created with help of Michal Jerz - author of excellent page Nokia 9110 World: http://n9k.ats.pl.

I'll be very thankful for any help in creating and maintaining this guide - please send me any information (or URLs where I can find it), suggestions and remarks. My FAQ currently concerns Nokia 2120, 2160, 3110, 3210, 5110, 5130, 5190, 6110, 6130, 6150, 6160, 6185/6188, 7110 and 9110 series of phones. If you have NetMonitor enabled in any other model (for example in 2110i, 8xxx, 9000), please contact me (to let me know about the differences and possible new tests).

Herewith I inform, that I don't bear any responsibility for any damages and other consequences caused by applying following information (you use it on your own responsibility) !

1. What is it ?

Net Monitor is just a special mode, which - when activated - shows different information about the network and about phone modules, SIM card, etc. After activation your phone will usually display a new, additional menu containing strange and constantly changing letters and digits. There are no standards here - each phone shows different data and there are different methods of activation (my description concerns NetMonitor mode in Nokia phones - if you have some other phone, you have to go somewhere else). I can even say, that NetMonitor (in some form) can be found in practically each present mobile phone (because it is unprofitable for the producers to make two separate software versions - with and without NetMonitor). Here you can find some URLs to the pages describing activation and/or individual NetMonitor menus in other phones:

• in English:
  • Alcatel One Touch Easy
  • Motorola
  • Siemens S1, S3, S3+, S3 Com i S4

• in German:
  • AEG Telecar D 902
  • AEG Teleport TP 9070 DTFX
  • AEG Teleport TP 9082
  • Siemens S4
  • Siemens S15, S16, Bosch DualCom 738, World 718, GSM-COM 607 i 908

• in Polish: see Polish version of this manual.

Other types: try searching on the links page www.mobilserver.com/Phone_info/.

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2. Do I need it ?

"Normal" users surely don't need any NetMonitor, because simply most of the data included there can be of any interest and use only for specialists (who can find out almost everything about the network). You also can:

• feel better and be able to brag that your phone has such a BBIIIIIGGGGGG choice of different options
• observe different network and phone parameters (I tried to explain their meaning in my description) and find out how cellular network works
• affect some functions in your phone and sometimes make your life easier (using these new options) - I did my best to point at many useful NetMonitor applications

If you still think, that you don't need it, read other pages concerning Nokia phones.

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3. Does my phone use more power with NetMonitor enabled ?

I'd say: NO. Each phone monitors the network even when there is no NetMonitor menu active.

But why some users say, that they have to charge their batteries more often after enabling NetMonitor? It is easy to explain: they frequently switch from one test to another (some people cannot stop ;-) and do it habitually) and the phone after each key press (by default) turns on the light (and uses much power - see Menu 10-23). This can be partially cured by using Menu 10-18. Additionally, some tests (for example Menu 10-17 or Menu 10-19) can put your phone in a state of constant network searching (which drains the battery).

To recap, NetMonitor activation itself doesn't affect power consumption. It can be only changed by some conscious user operations...

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4. How to activate it ?

You can do it in three ways:

1. by connecting your phone to the computer with a cable (in 3210 it has to be connected inside the casing) and using appropriate software (RECOMMENDED !) working in:
   • DOS:
     • version 1.3 of PC-Locals - supports both FBUS and MBUS cable connections.

   • Unix:
     • gnokii (main project page: http://multivac.fatburen.org/gnokii/; newest versions: ftp://ftp.inet.cz/pub/People/Pavel.Janik/gnokii/) - supports FBUS cable or IrDA connection)

   • Windows CE:
     • Light Sabre IDE (working over IrDA) from Light Sabre project (www.binet.lv/personal/nokia/ppc.htm).

   • Windows 95/98 i NT:
     • Logo Express (http://memsu1.iam.ntu.edu.tw/~jrywu/ or http://logoexpress.bizland.com/) - works with FBUS cable and IrDA port.
     • Logo Manager (http://clicksave.eu.org/nlm/) - uses FBUS/MBUS cables or IrDA.
     • gnokii
     • Andreas Schmidt program (www.aschmidt.de/) working with FBUS cable
     • version 1.3 of PC-Locals
     • NetMonitor (MBUS cable)
     • Nokia Wrench (www.wildies.de/nokia/index.html) - needs MBUS cable
     • Nok Commander (http://netcity3.web.hinet.net/userdata/nokiacmd/eng/) - working over FBUS/MBUS cable or IrDA port

   All above programs work with majority of Nokia phones with letter "S" in middle of codename (for example, 5110, 5130, 5190, 6110, 6130, 6150, 3210 series). With Nokia 7110 (NSE-5) over DAU-9P cable (from Nokia 5xxx/6xxx series phones) worked Pc-Locals only (it was rather problem with cable, but who know)... In Nokia 9110 (RAE-2) NetMonitor can be enabled with all above programs working with MBUS cable - Logo Manager, Pc-Locals or Nokia Wrench.

   When you want to check codename of your phone, try to use one of these codes: *#0000#, *#9999#, *#3110#, *#3810#, *#5190#, *#6190#, *#8110#, *#837#, *#170602112302# or *#682371158412125# (for more information about phone identification click here). If phone will display something, codename will be written in 3'rd line of screen (it will be something like NSE-1).

2. by direct changing the contents of EEPROM (Electrically Erasable and Programmable Read-Only Memory). This method requires opening your phone and leaves visible traces inside it. I DON'T RECOMMEND THIS METHOD! But if you want to do it:
   • www.eeprom.w.pl - a full description on how to do it in Nokia 5110, 6110, 6130
   • www.utg-bi.de/netmonitor.htm - a full description on how to do it in Nokia 5110, 5130, 6110, 6130 and 6150
   • www.cs.unibo.it/~lanconel/ - a description of the EEPROM memory programmer.

3. using special menu, which allow to programm NAM code (in some analog phones only - like Nokia 2160, 2120, 6160, 6185 and 6188):
   • use *3001#12345# code (sometimes pressing additionaly Menu is required; some sources write, that you have to write security code instead of 12345) to enter this menu
   • set "Field Test Mode" to "On"
   • restart your phone

You can also:

• ask people from GSM newsgroups to do it for you
• commission it to some specialized company

I don't know details about NetMonitor activation in 1610, 2110, 3110, 8110i, 8810 and 9000 series. I don't know exactly which programs to use (I heard only, that probably version 0.6 of PC-Locals allows to make it in older models) or how to modify EEPROM memory (if you know anything about that, please contact me). In this moment I can send you to Polish company Datex (www.datex.pl) or to the http://discserver.snap.com/Indices/16654.html page only.

I also heard, that in some copies of Nokia 6110 and 5110 phones it is possible to activate NetMonitor by a key combination (by pressing Menu key and typing 10 - this should work even when NetMonitor menu is not visible).

If you don't know how to activate NetMonitor, you better ask some more experienced person to do it for you (you can damage your phone during this operation) ! !

I'd like to draw your attention to one detail - in Nokia phones you just activate the monitor and not upload it (it is always in your phone - described methods just reveal it as an additional menu).

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5. Which NetMonitor version can be activated in my phone ?

Each program described in previous point allows you to activate one of two NetMonitor versions:

1. limited, including tests from 1 to 19 (concerning cellular network only). This version is usually called "Field Test" or "Operator field tests" (or you have to enter 242 code to activate it)
2. full, also including phone (and sometimes SIM card) tests. It is called "Engineering" (or "R&D field tests") and its activation code is 243.

I recommend you enable full version of NetMonitor - you can always replace it with a limited version (by choosing test 242 in your phone). It doesn't work in reverse direction (you cannot activate full menu from within the phone - it doesn't accept test 243 when limited version is active; of course you can still use methods described in previous point).

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6. Does NetMonitor activation void warranty ?

The method of re-programming EEPROM memory is connected with opening the casing and making modifications in your phone (which leaves many traces, scratches etc. and voids warranty).

However, these problems don't appear (you don't have to be affraid) when using one of the described programs or code (but I can be wrong . there are opinions that this method leaves a trace in phone.s memory, too)...

Of course, before getting phone to service, is better to deactivate NetMonitor. Sometimes, for example, when phone's energy system is damaged, it could be impossible - you can have some problems then (some of people working in service can think, that you broke warranty - it depends on concrete people)..

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7. NetMonitor menu in my phone has different number than 10. Is it normal ?

Of course, Number of NetMonitor menu (called "Net monitor" or "Field Test") is different (depends on firmware version and phone series) in different Nokia phones. It can be: Menu 7 (Nokia 3110 and 9110), Menu 10 (Nokia 5xxx, 6110, 6130; I'm referring to this number in this FAQ), Menu 11 (Nokia 5190 and 3210) or Menu 12 (Nokia 8210 or some 6150). Nokia 3210 also has a completely different icon for this menu. So, it's normal and don't be affraid.

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8. NetMonitor menu in my phone has 11 number, hovewer previous position has 9 number. Is it normal ?

YES - It's normal. We have such situation in Nokia 3210. "Lost" Menu 10 is reserved for SIM application toolkit and you will see it, when you will have access to them.

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9. How to use it ?

GSM/DCS/PCS phones:

After activation you gain access to the new position (called "Net monitor" or "Field Test") in main phone menu.

When you enter this menu, you can type number of the test, which should be displayed (1 to 19 in limited version, higher numbers in full version - Caution! Entering number 241 removes NetMonitor menu and 242 switches it to the limited version - you'll have to use one of the methods described in How to activate it ? to regain access to the full version !).

After pressing OK the chosen test appears on screen (and its number is shown on the top) in place of your network name/operator logo. If you enter incorrect test number, NO TEST appears on screen and the phone returns to the last correctly displayed test. If entered number is greater than 256, 512 or 768, then 256 (or its multiple) is subtracted and resulting menu number is displayed (for example numbers 300 and 556 run test 44). Some test when accessed this way (by typing its number and pressing OK to enter them directly) modify its contents (details are described later, I call this "DIRECT" menu access' - for example, see Menu 10-18).

You can look at different tests by scrolling them using up/down arrows (don't worry - this method doesn't change any settings in tests) - each key press moves you to the next/previous available test. In some models (for example in 5110) these keys have different functions (like displaying last dialed numbers, opening and scrolling phonebook or changing the volume) - unfortunately they don't work while NetMonitor is on screen:-(. However, you can still adjust volume during a call in Nokia 5xxx - by pressing and holding (longer than normally - about a second) one of the arrow keys.

You can return to the main screen with name/logo of your network by entering 0 in this menu.

If you enter 0 as a test number and then add a number of a non-existing test (for example 52), your phone will act as when NetMonitor is active (for example up/down arrows can be used to change test number - you can check this in Menu 10). Unfortunately, in this case counters from Menu 10-82 don't work. Tests chosen this way appear right after switching the phone on. You can use this feature to: temporarily "damage" your phone (to cheat your friend?) block access to your phonebook (Nokia 5xxx and 6xxx) prevent viewing your last dialed numbers list on the main screen with network logo/name (Nokia 5xxx) make it difficult to change volume during a call (Nokia 5xxx) - the arrow keys must be pressed and hold longer than normally make it impossible to change volume (Nokia 3110)

With any test on screen, your phone doesn't display some of the messages (for example. "...calling") and there is no calling party identification recognition (the only exception to the rule is a message: 'Note: you have active diverts'). When you type a phone number the test screen disappears (it will come back after you get connected or when you cancel this number from your display).

Help (description) to the current test can be displayed by pressing and holding * key (repeat this to return to test values). However, this shortcut works only in some phones (my explanation to this fact can be found in Description of the individual tests) - that's why I've added these help screens using a bold font in most of the tests... If they are currently displayed, entering menu directly doesn't change its settings.

There is one firmware bug connected with using helps (descriptions) to the tests (in this moment, it's confirmed for Nokia 5110 phones with different firmware versions). If you want to see it:

• Press and keep * key. In a moment, when * desappear from the screen (but before moment, when test values will be replaced with help or help with test values), let * key.
• Now you must do everything fast - * can't be written on the screen and text below NaviKey can't change: instantly press * for a moment and let it. You can repeat this point - effects will depend on repeat numbers. For example, with firmware 5.07 (or 5.11) and 0 repeats you will have access to first "hidden menu", with 1 repeat you phone hangs and turn off (see Menu 10-36 - it can be interesting), with 2 repeats it changes language ;-)), with 3 you can enter to another "hidden menu", sometimes (I don't know exactly, when) you can see "CONTACT SERVICE" message (restart you phone and everything will be OK). With firmware 5.24 result are different: with 0 repeats you can enter second "hidden menu", with 1 or 2 repeats desappear NaviKey description, with 3 its description changes to "Send".
• wait longer moment
• press for a moment and let one of the keys: *, 0 to 9 or #

You can restart your Nokia 5110, if it has older firmware (it doesn't work with 5.24, but with 5.07 and 5.11 works):

• Press and keep * key. In a moment, when * desappear from the screen (but before moment, when test values will be replaced with help or help with test values), let * key.
• Now you must do everything fast - * can't be written on the screen and text below NaviKey can't change: instantly press * for a moment and let it, instantly press * for longer time (2 sec. or longer) and let, instantly press * for a moment and let it

The reason of it is stack overflow (see Menu 10-35 and Menu 10-57). If it doesn't work with your phone and you have Nokia 6110, you can also use another trick to reboot phone:

1. Go to the Calendar (Menu-8)
2. Make a note or reminder.
3. Enter some text into the edit box.
4. Hold "Clear" until the whole text is cleared, then press "Back".
5. Press "0". The main screen will now be showing but a space appears on the screen. (you can't see it)
6. Enter 4 digits (e.g. 1234).
7. Use the down arrow to move the cursor to the left side of the numbers and the space (Down arrow twice).
8. Now enter 6 digits and press the call button.

TDMA 800/TDMA 1900 phones:

After activation you gain access to the new position (called "Field Test") in main phone menu.

When you enter this menu, you can type number of the test, which should be displayed (1-7 in Nokia 6160) or enter 0 to disable it.

You can look at different tests by scrolling them using up/down arrows. During voice calls, depending on how NetMonitor was entered, the arrow keys may switch tests (you can't change volume then) or adjust volume.

If the keypad is locked while a NetMonitor tests are active, pressing 0-9, *, or # will toggle the screen back to the User Interface Display. Pressing Talk, End, the arrow keys, or the soft menu keys will return the test.

In Nokia 2120 or 2160 you can also display description (help) to displayed tests by pressing and holding "ABC" key.

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10. Can I damage my phone ?

Probably only during NetMonitor activation (especially in phones with NAM programming menu). I've never heard of such accident (my own hard attempts :-) failed, too) during using it. But of course you should be careful - netmonitor is "unofficial" part of phone's firmware.

If something doesn't work correctly, switch the phone off and then back on - all tests, you can set (excluding Menu 10-17), will be set to their default values...

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Marcin Wiacek (WWW)
Last modification: 4 May 2000