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Tutorial : How to Send DTMF request from Nokia N900

on March 9, 2010 – 11:39 pm11 Comments

Hi folks as we know Nokia N900 does not support sending DTMF request to the operator for credit check and other details.

Finally there is a way to do so with a click of a widget . The widget used to send DTMF request is called the USSD Widget. It is developed by Guseynov Alexey , Martin Grimme.

The widget has two ways of sending the DTMF requests one is by typing the DTMF in codes in USSD dial Pad.

And the other one is USSD Widget

So its now possible to see the DTMF response in the homescreen. This widget support automatic widget checking and many other customizations like font color, widget background colour etc..

The USSD widget need runtime components like

  • python-hildondesktop
  • hildon-desktop-python-loader
  • pexpect
  • ussd-common

And the USSD components like

  • Ussd-pad
  • Ussd Widget

You can Download the package with all components here.

Then transfer the contents of zip file to root of N900 i.e N900/

Then goto X-Terminal and Type

sudo gainroot

then

type cd MyDocs

place all the contents of downloaded zip file to root of N900 i.e N900/

then type

dpkg -i filename.deb

example:

dpkg -i python-hildon.deb

likewise install

python-hildondesktop
hildon-desktop-python-loader
pexpect
ussd-pad
ussd-common
ussd Widget

Have a look at the video tutorial for more brief explanation

Let us know how it worked for you..

UPDATE:

To enable root in Nokia N900. Goto App Manager in N900 and find the app called rootsh in utilities or download it from here and transfer and install. Then you can type  sudo gainroot. It works fine. Sometimes it asks for password.When it does just exit the X-Terminal and type sudo root.

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  • Doctor Teach Me Fail

    USSD != DTMF

    USSD is a GSM protocol that uses a separate signaling channel.

    DTMF is a form of in-band signaling, meaning that the audio of its tones are sent in the same channel is the audio of your voice.

  • http://maemoarena.com siraj

    Thanks for the clarification bro :D

  • Gomes Adebowale

    Hi,
    Thanks very much for your information about using the ussd. I tried using it on my phone but it keeps tellong me ‘requested operation requires superuser privilege’.

    is there a way that i can work round it or how do i become a super user.

    Thanks while am waiting for your response

  • Azadi Saryev

    i am sure i recently read some ‘rumours’ somewhere that the upcoming firmware update for n900 will include ussd support in phone app… just can’t find the post now…

  • Woody

    You need to install the gainroot package via the standard app manager first to get the package that lets you become root. (Or install OpenSSHd, which allows you to set a root password, then you can just su into root.)

  • ali

    Dear Siraj,

    How r u

    Could you have any Idea that how to set MMS on N900 and I am living in Saudi Arabia

  • Anas

    i have done the cd MyDocs step then it says
    dpkg: status database ares is locked by another process

  • Selim Tannoury

    Thank you it awsome!!!

  • Tariq Iqbal

    Nokia N900 does not support sending DTMF request to the operator for credit check and other details.

  • http://www.gsmhosting.com RAMJAN

    the download link not work

  • Khalid

    Hello my friend,

    i was just asking to find out how to install the roothsh package because whenever i want to install it, the application manager pops up…
    please i need a reply and thanks..