I am going to share my experience on using the Tata Docomo SIM. I bought this sim two months ago. At first they give free plan of 350mb per month for three months and some free calls. As they have only 2G network, the surfing of internet and buffering of videos and downloading of music and videos are very worst. It doesn’t exceed 30kb speed. I tried to call customer care executives. They didn’t give the proper response. They o ly provide low call cost at all. Those who use keypad mobile with internet facilities good choice. Otherwise Android users not give priority to this.