My dear friend, In our country with in small period jio become famous. Are you know? What is the reason for is? . Jio gave us special offers like free 1 gb/day, cash back offers etc.
Merit:-
Best offers(free internet, cash back offers etc.)
high range in cities.
Demerits:-
low range in rural area
recharging centers are low
I think it help you. Have anice day. Thank you.