I have been using idea sim card on my mothers phone from last 3 years. During the first year I used to do prepaid recharges of 50 to 100 rs that offered less talktime and I used Internet very less those times. after 1 year I started postpaid plans that worked ok but the bill came out was very high every time it came nearly to 1500 to 1800 without using much Internet connection and calling it last long nearly for 7~ 8 months. Then again I swapped my plan to prepaid where I do 199 recharge and enjoy unlimited calling and 1 gb 4G Internet access for about 28 days. I realised how much money I wasted on this sim. Network is also not good. I suggest not to use this sim but if you are using then it will be better if you use prepaid plan's.