Tata docomo it is a 3g sim but it is popular in south karnataka why because its recharge offer is unbeatable and had a good standard network connection and it helps for by the low speed of 4g network all where using 4g most popularly and not so many people where using 3g so it is a smart decision for getting speed network and I will using for more than 3years and it is a compitetion of 4g network I not used other sim not exepting tata docomo I will be recomended to get a speedy network of tata docomo