During my school days I bought Cellnet simcard for my phone. Signal strength was not fare at all times. Specially at nights very big problems in connecting calls was there. I think it was due to low tower and more traffic on the network. Net service was also poor. 2g was working so slow. No 3g service was there in the area where I live. Now in era of 4g, nobody wants to use old 2g or 3g service by paying large amount. In total I just wanna say this network sucks.