I'm a MTNL triband user and thinking to shift to VDSL. Have some queries:1. What are the installation charges including the set up, the wiring and the one-time deposits? 2. Is it necessary to keep a telephone or can I get rid of it as nobody uses land-line here. If I cannot get rid of it, then what's the monthly charge for the telephone? 3. What is the monthly charge for the VDSL wireless router?