Syniverse blames global roaming outage on a signaling storm – Breaking News & Latest Updates 2026
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Richard Lawler
Syniverse blames global roaming outage on a “signaling storm.”

Last week, an outage disconnected wireless customers trying to use international roaming, and now we know why,

Syniverse says the problem was not a cyberattack but a “misconfiguration” that flooded its network with a near-infinite loop of error messages. Things are finally back online, and AT&T says it will credit customers for the days — but we haven’t heard more from T-Mobile or Verizon.

As a result of this root cause, the global network became flooded with error messages causing a near infinite loop called a “signaling storm.” This necessitated a blocking of a very limited number of peering partners who were producing excessive error loops and an upgrade of network capacity. We have now ensured safe performance and brought all peering partners back onto the network with full service restored.
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Image: Syniverse
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