Reliance Infratel officials declined to comment.
Sources, however, said that the company has entered into a deal with some American and European investors for the pre-IPO placement.
The latest deal values the company at around Rs 50,000 crore (Rs 500 billion) while the earlier 5 per cent stake dilution that Reliance Infratel had made, valued the company at about Rs 28,000 crore (Rs 280 billion).
The company had earlier privately placed 5 per cent stake to a group of institutional investors. Reliance Telecom Infrastructure sold the stake for Rs 1,400 crore (14 billion)
Earlier this week, market regulator Securities and Exchange Board of India cleared the initial public offering of Anil Ambani group firm Reliance Infratel.
Reliance Infratel, the telecom infrastructure division of Reliance Communications, would offer 10 per cent equity to the public valued at Rs 5,000-6,000 crore (Rs 50-60 billion).
The issue proceeds are proposed to be utilised towards funding development of passive infrastructure and general corporate purposes, the company had earlier said. Reliance Infratel owns mobile towers and other infrastructure.