Is it true that Bharti Airtel and Vodafone have lost subscribers to Jio in latest month?

You are right and this refers to the latest month that TRAI has announced the data for, which is the month of May 2021. For the month of May, the TRAI has reported that Bharti Airtel lost a staggering 46.13 lakh wireless subscribers, typically the lower end subscriptions which Bharti Airtel had consciously tried to week out and where Reliance Jio was the most active in adding numbers to push its hardware plan as a combined package.

Consequently, Reliance Jio added 35.54 lakh mobile users in May, even as the Indian mobile market overall shed 62.7 lakh users in May. As a result, the Jio subscriber base now stands at 43.12 crore, accounting for 37% of all-India subscribers. Vodafone also lost another 42.8 lakh users in May, reducing their subscriber base to just 27.7 crore users. Total mobile customer base in India currently stands at 117.60 crore as of May 2021.