Idea is one of the leading mobile operators in india. It is known for its range and first 3g service starter in india. Idea is best for business and professional purposes where coverage of signals matters a lot. And this problem of coverage is solved by idea. There is no fluctuation in its coverage. Voices and be crystal clearly heared. Internet speed is also provided at an awesome speed. Messaging service is as normal as others.
The main difference between idea nd other mobile operators is the problems are fastly solved by customer cares and there is a standard of coverage in idea network.
Also its not as other operators like disturbing customers every time by calling and texting them about any offers. It means it is pre configured with DND services.
If one wants to buy a sim, and if he is a businessman or professional person, then surely he should with IDEA.