Recently, JIO is a name which we heard by almost all the places.Mr.Ambani and his team has done a great job to spread the sim with a great strategy.In 45days it is the biggest mobile sim card brand.They offers free 4G internet, voice and video calling for all the mobile brands now.But they need to improve their networks in all the areas.Because jio is now the biggest sim brand.I personally use jio sim but I can’t get a speed like 4G and many times call does not go through.Cross connection happens all the times.Rearly, we can reach to the proper person to call.Networks coverage is also not satisfactory.So, I personally welcome jio for their great thinking but also need to development to provide good service to the coustomer.