I just got a new mtnl connection. They've provided me with a wifi modem. Not sure what make it is, all it says on the modem faceplate and on firmware page is 450TC1.Every now and then I lose internet connectivity on wifi. My netbook shows full signal strength, but internet wont work and the wifi icon will show the message "limited internet access" along with the small yellow exclamation icon. All I have to do is disconnect the wifi connection and reconnect and it works fine again. Dont have to restart the modem or anything else. Just end the wifi session and reconnect. Also am sure its not a netbook issue because the same problem persists on my phone as well. I leave nimbuzz and push mail on wifi and sooner or later they too show loss of internet connectivity. I have to end the wifi connection manually and restart the apps and then its working online.The frequency of the problem has increased acutely since the past week. While earlier the problem would occur after over an hours or so usage, since the past week the occurrence has increased to every 10-15 minutes.Cant quite figure out what the problem could be. Any help would be highly appreciated. Thanks.