Idea Network coverage is also good in rural and urban areas. I am working with construction company.we are working on 20 to 40 floor towers. I have tested more networks.i got idea signal on all floors.this is very good network with good speed.
Iits trusted & tried network .i am using idea numbers since 2005.basically iam from himachal at hilly area.every month I am travelling to my native town.teher is no breakup in network.& using same on the hilly areas.Even there are lot of upcoming telecom service providers, giving you best plan, call rates, talk-time etc. still prefer to go for Idea only. It will not cause you any future problems.