Release appearance
iOS 12.3.1 Public
Recorded context
About this appearance
The public iOS 12.3.1 release was a narrow maintenance update for VoLTE calls and two Messages filtering and reporting behaviors.
- Date
- May 24, 2019
- Availability
- available
- Revision
- No
Chronology evidence
Appearance sources
These sources support the recorded date, channel, or availability. A researched release-notes article has not been added.
- About iOS 12 Updates
Apple Support · 2026-07-29 · iOS 12.3.1 — Filter Unknown Senders
- Apple Security Updates (2018 to 2019)
Apple Support · Apple · 2023-11-06T00:00:00.000Z · iOS 12.3.1 — released May 24, 2019; no published CVE entries
- About iOS 12 Updates
Apple Support · 2026-07-29 · iOS 12.3.1 — Report Junk
- About iOS 12 Updates
Apple Support · 2026-07-29 · iOS 12.3.1 — VoLTE calls
- About iOS 12 Updates
Apple Support · 2026-07-29 · iOS 12.3.1
Release changes
Changed in this release
Features, fixes, removals, and regressions first observed in this release record.
bugFix · fixed
Messages Report Junk link fix
Apple restored the Report Junk link when viewing a Messages thread from an unknown sender.
- [1] About iOS 12 Updates · iOS 12.3.1 — Report Junk
bugFix · fixed
Unknown sender filtering fix
The update addressed a Messages issue that could allow unknown-sender messages into the main conversation list despite filtering being enabled.
- [1] About iOS 12 Updates · iOS 12.3.1 — Filter Unknown Senders
bugFix · fixed
VoLTE call reliability fix
Apple corrected a condition that could prevent VoLTE calls from being made or received.
- [1] About iOS 12 Updates · iOS 12.3.1 — VoLTE calls