Support Problem with internet connection

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http://androidforums.com – Hi friends, I am new to this forum. I am posting this i didn't find any threads related to my problem. I am from India purchased this SGS2 two months back(October). Network provider i am using here is Tata_Docomo(GSM). Problem is when i am using the internet after some time the network symbol will get disappeared and i will lose the internet connection. And after some time it will reappear again, but this will happen rarely. Most of the time i will lose the internet connection and i will go to mobilenetworks in settings and disable and enable the packet data service again to get the connection (General)