300g

This is still a work in progress but I have achieved higher success than my peers on the internet so I am posting my results here :

First of all as you might have noticed this device has two modes one is the storage device mode where it acts like a usb CDROM and the other is the modem mode. the Storage mode is the default mode. 

To make this device work the first obvious thing to do would be to switch its usb mode.

First just for the heck of it look at the output of lsusb

one of the lines would go like  0x1c9e:0xf000

right this is the vendor:productid  for storage mode of this modem

the vendorid:productid for modem mode is 0x1c9e:0x9603

get this file
http://www.draisberghof.de/usb_modeswitch/usb_modeswitch-1.0.2.tar.bz2

 First of all you need to extract it enter the extracted folder

copy the file usb_modeswitch to /usr/bin

$ sudo cp usb_modeswitch /usr/bin/

copy usb_modeswitch.conf to /etc folder

$ sudo cp usb_modeswitc.conf /etc/

open up usb_modeswitch.conf and add the following lines at the end

Thats the correct config for Micromax MMX 300G modem.

run the command 

$ sudo /usr/bin/usb_modeswitch

run lsusb again

voila: the modem mode is on. notice the new productid showing in the lsusb output

Wrap up by mounting the modem:

$ modprobe usbserial vendor=0x1c9e product=0x9603

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