Reliance Communications — 4g speed

Address:

Udaipur, Rajasthan, 313001

I am using reliance jio in my city and its average speed is about 400-600 kbps and ya luckily it sometimes reach to 1 maps but in a very rare case...
I wanna ask what is the meaning of 4g when i am getting speed of 3g... I am using 3g too and it also have speed around 500 kb... So why 4g?... Please speed up your network and give average speed around 2maps in 4g network..