The stock moved up 2.97 per cent to Rs 60.60 on BSE.
On NSE, shares of RCom gained 2.88 per cent to Rs 60.55.
RCom will offer shares in the company to Sistema Shyam TeleServices (SSTL) in return for acquiring spectrum and customers in nine telecom circles or service zones.
"Reliance Communications and AFK Sistema have entered into exclusive discussions on a potential merger between the Indian telecom business of Sistema Shyam TeleServices Ltd and RCom through a stock swap," RCom had said in a statement yesterday.