I am using Idea post paid service from last 5 years. I will recommend use idea service only for call services never go for data services.They will charge very high for data services.Even if we use facebook or any social media site they charge very high charges for net browsing. I personally frustrated by idea data roaming services. One time idea personally charged more than rs5000 due to data roamining services.Accidentally I started mobile data which charged me alot.