Has any one taken the 4500 for 6 mnths unltd data plan. I got this plan activated and now have a billing query after recving the first bill.The bill has a monthly charge of 5125+servce tax In the details of the bill the 125 charge is grouped under "SPEECH" MTNL cust care says theyl call back and tell me about it.If some one has taken this plan please elaborate...