I heard that MTNL is giving free caller ID instrument to those who have subscribed to Combo Plan. I called 1500 to confirm it and they said that they are giving free caller ID instrument to combo plan users. Then i asked, will they charge any rent for caller ID facilty and the CC support said that Rs.25/ p.m. will be charged.But, one of my neighbour said that it is absolutely free and they don't even charge Rs.25/month. Can anyone clarify ? I have called 1500 guys 3-4 times and every time they reply that Rs.25/month will be charged and my neighbour says otherwise!