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SendGrid: Silent Network Authentication (SNA) Missing Redirects on Vodafone in United Kingdom

Affected components: CARRIER NETWORK - Verify Silent Network AuthVerify Silent Network Auth

Timeline of updates

1. identified2026-10-11 05:17 UTC

   Twilio customers may be experiencing device verification timeouts during API transactions for Silent Network Authentication (SNA) on Vodafone in the United Kingdom. API transactions may temporarily fail over to secondary methods like SMS OTP. Our team is actively investigating the issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. monitoring2026-10-11 05:58 UTC

   We have observed the recovery in API transactions for Silent Network Authentication (SNA) on Vodafone in the United Kingdom and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

3. monitoring2026-10-11 07:58 UTC

   We have observed the recovery in API transactions for Silent Network Authentication (SNA) on Vodafone in the United Kingdom and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

4. resolved2026-10-11 11:59 UTC

   The incident has been resolved and API transactions for Silent Network Authentication (SNA) on Vodafone in the United Kingdom are operating normally.

Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). SendGrid profile · Recent SendGrid incidents · Markdown · JSON