Соловейко західний

I want to know which bird it is which i snapped from my room.
Perched on a cable wire,it emits different kind of tones.Smaller than sparrow.
I am from Kolkata, India.
The pictire is from web but not exactly similar to what i clicked.

Hello Chiraranjan! Upload your photo on http://indianbirds.club/ which is the Indian site of our network. And you almost definitely find out which bid it was. Good Luck!