Ericsson (Telefonaktiebolaget L. M. Ericsson) is a Swedish multinational provider of communications technology and services. read more at WikiPedia

  • Make your sony ericsson k750 mobile phone communicate with your PC under linux...

    The difficulty is to find the right device the sony ericsson k750 has received from linux

    1. Open a terminal console, ans as root (type # su then root password)
    2. verify that udev (the automounting system) has recognized your phone. type
    # lsusb
    Bus 003 Device 006: ID 0d49:7100 Maxtor
    Bus 003 Device 001: ID 0000:0000
    Bus 002 Device 050: ID 045e:0025 Microsoft Corp. IntelliEye Mouse
    Bus 002 Device 001: ID 0000:0000
    Bus 001 Device 006: ID 0fce:d016 Sony Ericsson Mobile Communications AB
    Bus 001 Device 001: ID 0000:0000

    For me the telephone has been recognized...

    3. Lets find the device now, type
    # dmesg
    and search for the ericsson, If You find the device name, You are lucky. I must admit that I did not find it like this,
    I brute force all possibilities :-) since I find on the official homepage of kmobiletools that it must be /ttyACM*

    4. check permissions
    most of the time only the root has access to ttyACM (must be the modem port), check
    # ls -la /dev/ttyACM*
    crw-------  1 root uucp 166, 0 2005-03-19 20:36 /dev/ttyACM0
    crw-------  1 root uucp 166, 1 2005-09-10 23:19 /dev/ttyACM1
    crw-------  1 root uucp 166, 2 2005-03-19 20:36 /dev/ttyACM2
    crw-------  1 root uucp 166, 3 2005-03-19 20:36 /dev/ttyACM3

    5. change permissions temporarly (will be overwritten at reboot by udev and that's better because i am gonna give full access to all)
    # chmod a+rw /dev/ttyACM

    6. verification
    # ls -la /dev/ttyACM*
    crw-rw-rw-  1 root uucp 166, 0 2005-03-19 20:36 /dev/ttyACM0
    crw-rw-rw-  1 root uucp 166, 1 2005-09-10 23:22 /dev/ttyACM1
    crw-rw-rw-  1 root uucp 166, 2 2005-03-19 20:36 /dev/ttyACM2
    crw-rw-rw-  1 root uucp 166, 3 2005-03-19 20:36 /dev/ttyACM3

    7. start kmobiletools and go to the menu Settings / main settings

    as "mobile phone": choose Ericsson generic
    as "mobile phone device" enter one of these (brute force phase)
    /dev/ttyACM0 or
    /dev/ttyACM1 or
    /dev/ttyACM2 or
    click after each choice, apply, if You did not receive an error message, then You have found the right modem tty

    and it work!!! see screenshots below (click read more)

    in order to set access rights on ttyACM1 "correctly" and  definitively, You must as root open the file
    search for ttyACM, I found for my SuSE 9.3
    KERNEL="ttyACM*", NAME="%k", GROUP="uucp", MODE="660"
    change to
    KERNEL="ttyACM*", NAME="%k", GROUP="uucp", MODE="666"

    note 666 is unsecure, better would be to add user to the group, but i don't want to risk instabilities if I do not know how to do it: Any Linux master reading this text?


    And Result

  • Determine K750 ROM version

    first determine which software version your Sony Ericsson k750i is running:

    Put in this sequence: >*<<*<*  and do not look at what the screen is displaying while typing, a hidden menu should appear. Then go to service info. from there choose software info

    • The first version of the rom is R1A044
    • The latest (today) is L R1L002

    Install the latest firmware

    Go to the support homepage of Ericsson (only with IE not firefox):
    • Choose automatic mode
    • Check the prerequisite (a list with checkboxes)
    • Install the java application
    • Connect he usb cable to the phone
    •  Accept the licence and let the java applet connect to the phone and download the latest rom for You.
    •  A popup windows:
    1. Ask You to switch the phone off, and disconnect it from the usb, do it
    2. While pressing the button "C" to connect it to the usb cable
    BUT Windows complains about the driver, even If you have install the full Ericsson suite
    download the driver here: (was not found on the genuine cd)

    - after installing the driver, the update should start an be completed in 12 minutes more or less...
    - I was the force to remove the battery because my phone was temporarly blocked, after the restart, the phone complete the installation and it's finish.
    - verify that You have the latest ROM version