Field test mode (FTM) or field test display (FTD) is a software application often pre-installed on

mobile phone A mobile phone, cellular phone, cell phone, cellphone, handphone, hand phone or pocket phone, sometimes shortened to simply mobile, cell, or just phone, is a portable telephone that can make and receive telephone call, calls over a radio freq ...

s that provides the user with technical details, statistics relating to the

mobile phone network A cellular network or mobile network is a communication network where the link to and from end nodes is wireless. The network is distributed over land areas called "cells", each served by at least one fixed-location transceiver (typically th ...

and allows the user to run hardware tests on the phone. On older

Nokia Nokia Corporation (natively Nokia Oyj, referred to as Nokia) is a Finnish multinational telecommunications, information technology, and consumer electronics corporation, established in 1865. Nokia's main headquarters are in Espoo, Finlan ...

phones this mode is known as Netmonitor while newer Series 60 phones have a Field test application which requires a hacked phone to be installed. Many other brands of phones have similar functionality available, often accessed by entering a code into the phone. For GSM phones it may provide such details as * TDMA timing advance * Cell ID *Transmit power and received signal strength indication (RSSI) *Neighbouring cell info and PLMN codes * Location area code * TMSI number * Timeslot / paging informationNokia new netmonitor information
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References

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External links

Field test display blog
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Wiki opencellid.org
Mobile phones