Mtnl Mumbai has a Bill Check /pay window for all u people with net connections and internet banking.
If u r uncomfortable with paying the bill using the ecs facility this is the best option for u. U have to register here.
In a weeks time u will get ur passwd on ur email address and u can login and check the contents of ur bill and if payment is pending, later u have the option of paying it online thru their payment gateway using a credit card or thru netbankg using a whole bunch of banks. Ps u also get some kind of a discount using this method
Update : July 07 onwards if all u want to do is pay then u dont have to register, just try this link for direct bill pay