# Field test mode

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> Source: https://en.wikipedia.org/wiki/Field_test_mode
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thumb | right | A Nokia phone in Field test mode.'''Field test mode''' ('''FTM''') or '''field test display''' ('''FTD''') is a software application often pre-installed on [mobile phone](/source/mobile_phone)s that provides the user with technical details, statistics relating to the [mobile phone network](/source/Public_land_mobile_network) and allows the user to run hardware tests on the phone.

== Nokia network monitor ==
'''Nokia network monitor''' ('''Netmonitor''') or '''Monitor Mode''' was a hidden mode on most [Nokia](/source/Nokia) cell phones used to measure network parameters. Additionally there are measurements for phone and battery temperature and other phone specific measurements and tests. The mode can only be activated over a special [FBus](/source/FBus), or [MBUS](/source/MBus_(Nokia)) cable; or in some cases over infrared. Free software exists on the internet that allows one to activate this mode. The first step is to select a Nokia Phone like [Nokia 3310](/source/Nokia_3310) that has network monitor then activate the monitor. To activate, download software such as [Gnokii](/source/Gnokii), gammu<ref>[https://manpages.ubuntu.com/manpages/bionic/man1/gammu.1.html Ubuntu Manpage: gammu]. ''manpages.ubuntu.com''</ref>, logomanager, or N-Monitor by Anderas Schmidt and connect the mobile with a [FBus](/source/FBus) cable. In Nokia phones you just activate the monitor and not upload it to the phone, as it is already present.

Some of [Nokia](/source/Nokia) [Series 60](/source/Series_60) phones have a '''Field test''' application installed or it could be installed with privileged permissions or on rooted phone.<ref>[http://www.finestfones.com/2008/05/fieldtestnetmonitor-arrives-onto.html FieldTest/Netmonitor arrives onto liberated devices]</ref>

Such mode and programs are available on Android and iPhone devices.

==Options==
For GSM phones it may provide such details as
*[TDMA](/source/Time-division_multiple_access) [timing advance](/source/timing_advance)
*[Cell ID](/source/Cell_ID)
*Transmit power and [received signal strength indication](/source/received_signal_strength_indication) (RSSI)
*Neighbouring cell info and PLMN codes
*[Location area code](/source/Location_area_code)
*[TMSI](/source/Temporary_Mobile_Subscriber_Identity) number
*[Timeslot](/source/Timeslot) / paging information<ref>[http://www.belnetmon.bn.by/doc/nokia_new_netmon.pdf Nokia new netmonitor information]</ref>

==References==
{{Reflist}}

==External links==
*[http://phoneftd.blogspot.com Field test display blog] (for details on enabling)
*[http://wiki.opencellid.org/wiki/Public:Field_Test_Mode Wiki opencellid.org]
*[http://www.panuworld.net/nuukiaworld/misc/netmon/index.htm "The Nokia Network Monitor"] by Nuukiaworld, a good starting point
* [http://www.aschmidt.de/nmon.zip Download N-Monitor by Andreas Schmidt]
* [http://www.logomanager.co.uk/help/Tools/NetMon.html Description by Logomanager]
* [http://www.mwiacek.com/gsm/netmon/faq_net0.htm#4 FAQ]
{{Nokia services}}
Category:Mobile phones
Category:Nokia services

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Adapted from the Wikipedia article [Field test mode](https://en.wikipedia.org/wiki/Field_test_mode) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Field_test_mode?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.