The most attractive mobile network service provider now-a-days is reliance jio .
with its welcome offer of free INTERNET, VOICE CALLING and SMS .
with the help of having a mobile phone eligible for offer code, I got the JIO sim .
the internet speed is very good but the thing I don’t like is, it needs internet connection even for VOICE CALLING AND SMS.
the VOICE calling and SMS works through JIO app .
but those who don’t own an smartphone with welcome offer can not avail this .
this is the main un satisfactory point .