Micromax USB Modems are mostly usable Modems in india for connecting to the internet, because it supports all the GSM networks, most of the people buy these modems like Micromax 352G, 353G etc. so if you are using any of the USB Modem or Micromax Data Card and you are using any of telecom services like IDEA, VODAFONE, TATA DOCOMO, AIRTEL, VIDEOCON, BSNL etc. but you are not able to connect to the internet. So what you can do.
While connecting to the internet through Micromax USB Modem, if you are facing problem or there are occurring error of NO SERVICE, In that case there might be many causes like Network Range, SIM compatibility etc. So, for solving this, I suggest you that this is because of the Network Range problem, because Micromax Modems are occurring problem in catching network signals. So I suggest you to use the internet where, there is the network range are full.
Or you can also check the network mode setting, if you select the HSDPA/UMTS network. May be that network is not available so you can try GPRS network. Or you can also choose the network by manually in the Network Selection Setting. But in my situation networking catching power was the reason for NO SERVICE Problem. You can also try to use at a place, where network range is full. I hope this can be helpful.
If any case, this will not work, you can go to the Micromax Service Centre and update the internal software or can be change the USB Modem or Data Card.