My brother is using idea sim for past 6 months and its network is not good at all and its internet speed is also Not good as I my recharged its internet data plan But it finish very quickly and in the name of 4g it does not give much speed and in many areas in delhi its signals also not good.so those who want to buy idea sim so please also review other operators like airtel as there recharge and internet pans are quite satisfing and goos so I personally recommend to go for airtel mobile operator as its signal is very good