I had use idea sim card for past 3 years. Idea is one of the best cost effective sim cards in india. The talk time scheme for idea is very good. The rate cutter is also cost efective. But the only drawback is poor network coverage. In my village the 2 g speed is very nice but the 3 g coverage is less. The 3 g tower is very slow. The net pack plan is very wonderful . No other company will give the full talktime plan better than idea. The idea to idea is 10 paisa which is very cheap and to other phone is 30 paisa.