On BSE, the stock jumped 25.90 per cent to close at Rs 97.95. During the day, it gained 29.2 per cent to Rs 100.50.
The scrip settled at Rs 98, up 25.64 per cent on NSE.
Following the rally, the market capitalisation of Idea Cellular rose by Rs 7,257.41 crore to Rs 35,278.55 crore.
On the volume front, 1.53 crore shares were traded on BSE while 15.48 crore scrips changed hands on NSE.
Also Read
In a BSE filing, Idea Cellular said it constantly evaluates various opportunities to enhance stakeholders' value.
"As part of the exercise, the company has been in preliminary discussions with Vodafone," it said.
Idea emphasised that the fundamental premise of preliminary discussion is based on "equal rights" between the Aditya Birla group and Vodafone in the combined entity.
"In view of the fact that the discussion is at preliminary stage, the company is not in a position to share any further details... Further, there is no certainty that the discussion with them will result in any agreement," the company said.
Any merger will be effected through issuance of new shares in Idea to Vodafone and would result in de-consolidation of Vodafone India, it added.
Disclaimer: No Business Standard Journalist was involved in creation of this content