Release record
Release notes
Editorial synthesis with inline references and a source ledger when citations are available.
iOS 12.1.2 was an iPhone-focused maintenance release that corrected eSIM activation on iPhone XR, XS, and XS Max and addressed cellular connectivity for those models in Türkiye.[1]
Apple’s 2018–2019 security index lists the release date and explicitly states that iOS 12.1.2 has no published CVE entries, so this record does not infer any security detail beyond Apple’s disclosure.[2]
Source ledger
Sources are linked to the claims they support. Publication and access dates are shown when available.
Apple Support · Apple · 2023-11-06T00:00:00.000Z · iOS 12.1.2 — no published CVE entries; released December 17, 2018
Apple Support · Apple · 2023-11-06T00:00:00.000Z · iOS 12.1.2 — released December 17, 2018
Documented & observed
Source-linked features, fixes, known issues, removals, and community-observed behavior recorded across this version’s appearances and verified builds.
Release changes
Features, fixes, removals, and regressions first observed in this release record.
bugFix · fixed
The update addressed a cellular connectivity problem affecting iPhone XR, XS, and XS Max in Türkiye.
Recorded at Public
bugFix · fixed
Apple fixed an issue that could prevent eSIM activation on iPhone XR, XS, and XS Max.
Recorded at Public
Milestones
Every recorded channel appearance in chronological order. Open an appearance for any available build, scope, notes, and sources.
Developer beta
Public release
The public iOS 12.1.2 release was a focused iPhone maintenance update for eSIM activation and cellular connectivity.
Historical context
Pace, intervals, and duration compared with earlier releases on the same platform.
Cycle vs. platform average
7d (avg: 58d)
51 days shorter than the iOS average