Reliance Jio has become the country's largest telecomoperator witha subscriber base of 331.3 million, surpassing Vodafone Idea which on friday reported a decline in its user base to 320 million by June 2019According to the financial results reported by Reliance Industries last week, its subsidiary Reliance Jio had a user base of 331.3 million by June 2019. 
   On otherside Vodafone Idea reported a decline in its customer base to 320 million in the first quarter of  2019-20 from 334.1 million in the March quarter