In a rare show of unity, India’s top telecom operators — Reliance Jio, Bharti Airtel and Vodafone Idea — have jointly written to the Mumbai Metro Rail Corporation Ltd (MMRCL), raising concerns over its latest tender for in-building solutions (IBS) on the city's first underground metro rail network, Aqua Line 3, offering to buy out the infrastructure to expedite the resumption of mobile connectivity. 

The letter comes in the backdrop of MMRCL terminating its earlier IBS contract with Saudi Arabia-based Advanced Communications and Electronics Systems Company (ACES) and floating a fresh tender on March 20, 2026.