DIGIT-ARC read-only archive · snapshot: July 23, 2026

Problem in Micromax MMX 300C HSIA Modem

10 posts · originally from https://geek.digit.in/community/threads/problem-in-micromax-mmx-300c-hsia-modem.177747/

sahil1033
sahil1033 Original post #1
Sep 11, 2013 at 10:23 PM
I'm using BSNL EVDO on Micromax MMX 300C. What happened is the when the messages got full in the modem, i clicked on " delete all ". Now after that session, when I ran the PC Manager, a dialog box appeared saying " Unknown SMS error! Please check device and restart to try again. ". When I click on " OK ", it appears again and there's no way to close the dialog box and because of that box I'm unable to access the PC Manager. I'm not receiving anymore message since then and even it's not showing up in My Computer. I'm using Windows 8 Pro.
Help please asap !!
sahil1033
Sep 16, 2013 at 11:55 AM
I expect someone to reply atleast on India's active most IT forum.
W
Sep 16, 2013 at 9:33 PM
looking at the posts here it is to be expected that you won't get much response for issues like this.also data cards are different from PCs & the most usual/recommended solution is to remove all datacard software/drivers & reinstall.the fact that you are using windows 8 is another factor because many drivers/softwares working fine on windows 7 may not run as well on windows 8 despite their compatibility.
sahil1033
Sep 16, 2013 at 11:22 PM
looking at the posts here it is to be expected that you won't get much response for issues like this.also data cards are different from PCs & the most usual/recommended solution is to remove all datacard software/drivers & reinstall.the fact that you are using windows 8 is another factor because many drivers/softwares working fine on windows 7 may not run as well on windows 8 despite their compatibility.
The thing is, it's not showing up in My Computer and if I reinstall the drivers then I would never be able to run the data card.
W
Sep 17, 2013 at 10:13 PM
bad luck then.i suggest experimenting on another system or you can make a image of your current C drive & then experiment.if anything goes wrong you can restore image to go back to your current situation.
sahil1033
Sep 17, 2013 at 10:33 PM
Okay, I'll try this too.
S
Apr 7, 2014 at 1:11 AM
[MENTION=144166]sahil1033[/MENTION]: I am having the same problem with BSNL EVDO. Did you find a solution to this problem? Please share
sahil1033
Apr 7, 2014 at 12:36 PM
[MENTION=144166]sahil1033[/MENTION]: I am having the same problem with BSNL EVDO. Did you find a solution to this problem? Please share
Which one? The dialog box not going away or drive not showing up in My Computer?
S
Apr 7, 2014 at 4:40 PM
[MENTION=144166]sahil1033[/MENTION]: I am having both the problems.
sahil1033
sahil1033 #10
Apr 7, 2014 at 11:36 PM
Okay then, see the dialog box problem disappeared one day suddenly. I used a trick to connect to the internet, when i inserted the modem into the USB, the moment connect button appeared, i used to click at that very moment and the dialog box used to appear afterwards and by that time i was connected to the internet. So, no problem with dialog box but still somehow it went away one day.
Now, about the drive not being shown in My Computer, I've no idea how to solve that problem and thank god I backed up the setup to MMX 300C before this happened. So, what I've done is I carry my modem carefree as I've uploaded the software on cloud storage. :cool: