** Shares of telecom operators Bharti Airtel Ltd and Idea Cellular Ltd fall as much as 4.1 pct and 7.3 pct, respectively
** Reliance Industries Chairman Mukesh Ambani unveils a low-cost phone with 4G-enabled features by its Jio telecoms venture
** Jio's entry into telecoms sector with cheap voice, data plans has hit profits at rivals
