Right now im using Hathway. but soon will be changing to Airtel.I would like to know wether Airtel allows me to use my own moden to access the net ?? The modem i got is Motorola SURFboard ! it is failry robust so i dnt wanna give it back to Hathway, that is if i can use it with airtel !!And about the airtel tariffs do they charge for changing of tariffs ?? because their installation charges are different for different schemes. like 500rs for 1GB and 900rs for unlimited. I was thinkin can i choose a 1GB tariff first and then shift to unlimited tariff, in this way i can save 400rs !!!