AirFiber or Xstream?

I was looking to get a broadband installed at my home, but I am not sure which one to get. I have air fiber at village near Nanded and it's terrible. The ping is so bad and also it gets disconnected very often. I am not sure about its functionality in City Whereas about Xstream I never used it. I want a Broadband which have very stable network. What would you suggest?