analytics google

Friday, 17 February 2012

Disable Huawei cd rom and sd card for 3g router.

Intermittent disconnect from 3g router using usb modem dougle, one of the main reason was cause by the modem dougle itself, we have to remove the additional build in cd-rom and sd card slot so as to let the router read only the modem alone without trying to read other function that the dougle can provide.

The following step will disable the unwanted function and will not confuse the router anymore.

1) Download Putty. If the link no longer useful please google it "Putty"(Program to use AT command on modem)
2) Insert the 3g Modem to your pc
3)On your pc RIGHT CLICK on "My Computer" and click on "Properties"

4)Go to "Hardware Tab" and click on "Device Manger" Button.

5) Click and expend "Ports (COM & LTP)" and take note of the Huawei modem (COM14). (this tell us that the modem it located under "COM14". *different pc has different number, just take note whichever number you get.

6) Now Run the Putty.exe that you previously download. Select "Series" Enter the "COM(Number that u get previously)" and hit "Open"

7) Key in "AT^U2DIAG=0"(you will not see what you have key) and hit "Enter" on ur keyboard. Next you will see a "OK" appear on screen and you are done.
8) Now your modem is ready to plug to your 3g router and use.

AT^U2DIAG=0 – Turn off Fake CD and SD Card. (this is good for routers)
AT^U2DIAG=256 – Turn off Fake CD (the application software installs from this)


  1. A great article for this specific topic.
    The deletion of information almost always directs a user to some sense of discontent.
    However for the ease of users, experts have designed a an alternative for data corruption challenges.
    If a deletion of data scenario is occured, person got to know which application or computer software to use so that he can manage this scenario of data damage.
    outlook corrupt pst

  2. Thanks a lot..I it saved me a lot of headache that i had when i was connecting the dongle to my raspberry pi..

  3. Thanks for the marvelous posting! I quite enjoyed reading it, you may be a great author.I will be sure to bookmark your blog and definitely will come back very soon.
    Samsung Hard Drive Data Recovery

  4. Hi buddy
    Do I need to insert SIM card before using AT command in putty?