Rentfree postpaid - yet another gimmick

The last few days, I have been subjected to the advertisement of the newly launched Rent Free PostPaid cell phone plan from Tata Docomo in the radio.  Sounds too to be true, right?

It was, till I saw a banner ad, in a traffic jam.  As usual an asterix (*) symbol and a fine print at the bottom - rent free when the usage charges exceed Rs.500/-.  No such mention is made in the ad, of course, though even the most gullible person would think there must be a catch.

A look at the plan (applicable only in select states) reveals that it is still an attractive plan (even without the rent-free).  Evidently, mobile operators are waging war with each other to retain their existing customers and migrate other customers to them.