Have a bsnl teracom modem , lan is being connected in pc , but not able to use wifi , everytime i connect via laptop , it gets connected but shows no internet access , the same if i connect via a smartphone with android 2.3 it is being connected, the same if i connect through android 4 ics its not being conncted, no problem with the phone and laptop too caus they are connected to wi fi at my friends place, what might be the problem ?