Guess I am an old fashioned guy mates, who always found my mtnl landline & internet enough for my communication needs. And I never said, I never used a mobile before, just never owned one so don't know much about buying one. But I guess this is something you ask your next door neighbor or close friend, not the internet.Did some research, one question, when you get a prepaid SIM card for a certain mobile service like Airtel, Reliance, Vodafone, BSNL, Idea, MTNL etc with lifetime validity, I heard that one has to recharge with a minimum amount every six months to keep the SIM connection alive. Is there any service as of late 2011 where lifetime actually means one doesn't have to recharge every six months to keep getting free incoming calls.MTNL need Rs.100/- minimum recharge in six months, Vodafone Rs.200/- same duration I think. Which is the best service in this regard (in Mumbai preferably).Another question, I heard many mobile services keep sending advertising messages to their users for recharging etc, which has been known to be bit annoying. Which mobile service is good in this regard.