Optus, Australia's second-largest telecom provider, has faced multiple major outages in recent years, with causes varying by incident. The most recent significant disruptions, including those in early 2026, stemmed from technical glitches rather than a single event.

Latest 2026 Outage (February)

A widespread mobile service failure hit hundreds of thousands of Optus customers around February 9, 2026, showing "no service" or "SOS" on devices.

Optus attributed it to a technical issue involving their network equipment, possibly linked to vendor Ericsson, though full details remain unclear as investigations continue.

This followed a pattern of vulnerabilities exposed in prior reviews, including emergency call failures during outages.

September 2025 Fatal Outage

A scheduled firewall upgrade in South Australia on September 18, 2025, triggered a nationwide blackout, blocking ~600 triple-zero (emergency) calls and linked to three deaths.

Optus CEO Stephen Rue called it human error —procedures weren't followed during the upgrade, causing a cascade failure and no fallback to other providers.

A Senate inquiry and independent review highlighted poor testing, disaster recovery, and over-reliance on single networks.

"Something’s failed, and that’s made something else fail... Getting to the bottom sounds like a nightmarish job." – Expert commentary on outage cascades

Earlier Incidents

  • November 2025 (Melbourne) : Vandalism —cut fiber optic cables disrupted 14,000+ users, including emergency calls.
  • 2023 Nationwide : BGP routing flaws post-software upgrade downed services for hours; Optus fined $12M for emergency call blocks.
  • Recurring theme: Cost-cutting on staff, out-of-band management, and testing, per forum experts.

Outage Date| Cause| Impact| Source
---|---|---|---
Feb 2026| Tech issue (Ericsson?)| 220K+ "no service"| 5
Sep 2025| Firewall upgrade error| 3 deaths, 600+ failed 000 calls| 97
Nov 2025| Vandalism (fiber cut)| 14K users, emergency blocks| 3
Nov 2023| BGP routing post-upgrade| Nationwide, $12M fine| 110

Trending Context & Reactions

Forums like Reddit erupted with frustration, blaming chronic underinvestment —e.g., no Telstra backup for core fixes.

Australians demand tougher rules; government announced stricter telecom oversight post-2025 fatalities.

As of February 2026, Optus faces ongoing scrutiny amid repeated "tech issues."

TL;DR : No single "the" Optus outage dominates headlines—latest (Feb 2026) was a vague tech fault; deadliest (Sep 2025) human error in upgrades. Patterns point to systemic lapses.

Information gathered from public forums or data available on the internet and portrayed here.