Technology & Science

ISRO’s LVM3-M6 Lofted AST SpaceMobile’s 6.1-ton BlueBird Block-2, Largest Direct-to-Phone Satellite

At 08:55 IST on 24 Dec 2025, India’s heavy-lift LVM3 placed the 6,100 kg BlueBird Block-2 into 520 km LEO, inaugurating the first U.S. mega-antenna spacecraft capable of delivering 4G/5G service straight to unmodified smartphones worldwide.

By Priya Castellano

Focusing Facts

  1. BlueBird Block-2 deployed a 223 m² phased-array antenna, the biggest commercial communications array ever unfolded in low Earth orbit.
  2. Its 6,100 kg launch mass broke the previous Indian record of 4,400 kg, becoming the heaviest payload ever launched from Indian soil.
  3. The mission preserved LVM3’s flawless 8-for-8 record since 2017 and was its third fully commercial flight handled by NSIL.

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