I am sharing with you bad experience of tata docomo sim.i used the tata docomo sim from the past 4 years such a its worst network even all network. server problem always cut off the call to talk.and metro area is not responding and Switch off the phone tells him that. I bought a tata docomo sim card worsted thing ever. I tried to change the sim and port my sim to other sim operator but its not port . Docom sim card is my main number & cant port it to other sim operator 3 month so I suggest to people that dont buy the sim of docomo. and finally I change the number to Airtel. Please don’t buy this sim its worst network.