The Free Fire OB53 Advance Server, which concluded in early April 2026, provided early access to "Undersea Mystery" content and rewards for reporting bugs
that allows a limited number of players to test upcoming game features before their global release. The official website for this program is ff-advance.ff.garena.com Current Status & Timeline (April 2026) April 14, 2026 , the recent OB53 Advance Server testing phase has concluded. Open Date: March 20, 2026. Close Date: April 2, 2026. Next Expected Phase: The Free Fire OB53 Advance Server, which concluded