i have compex adsl2/2+usb & ethernet modem/router....and now i want to use airtel 3g with the sim...can i use the sim card in modem? how? please help me.thank you
May be not. You're using an ADSL modem, that's meant to work on a wired network, telephone line or a dedicated broadband line, so, you probably don't have any slot for a sim card in your modem. To be able to use 3G network to connect to the internet, you need to buy a 3G data card.
no.you have a 3g data card and a 3g router (if you need wireless connectivity)
Well, yes, if your router supports it. Mine does, asus rt N13U B1.