I switched from Idea to TD. My number is from Mumbai circle but I use it in Pune. Both have decent network coverage but I had lots of problems with Idea regarding their hidden charges and their poor customer care which was mostly unapproachable for my issues. I have switched to TD and find they are much more transparent and overall I am able to at least have proper conversations with CC as well as their chat service.
After hearing from others on this forum, it appears that Idea provides good CC for postpaid connection but is simply horrible for prepaid.
If you are on prepaid you might find TD a better alternative.
On the subject of network coverage, both are equally good within Mumbai and Pune but Idea has better connectivity on the Mumbai-Pune route.
Thanks a lot for that info. I have a prepaid connection. It is good to know that TD has better customer service. Contacting Idea has been a terrible experience for me.