Release record
Release notes
Editorial synthesis with inline references and a source ledger when citations are available.
iOS 9.2.1 was a maintenance release whose sole itemized consumer fix allowed an app installation managed by an MDM server to complete.[1]
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 9.2.1 — January 19, 2016
Apple Support · 2026-07-30 · iOS 9.2.1 security content
Apple Support · 2026-07-30 · iOS 9.2.1
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
Apple fixed a condition that could prevent an app installation managed by an MDM server from finishing.
Recorded at Public
security · fixed
Apple addressed CVE-2016-1730 by isolating cookies for captive portals, preventing the documented read-or-write access to a user’s cookies.
Recorded at Public
Milestones
Every recorded channel appearance in chronological order. Open an appearance for any available build, scope, notes, and sources.
Public release
The public iOS 9.2.1 release repaired MDM-managed app installation and delivered documented security corrections, including captive-portal cookie isolation.
Historical context
Pace, intervals, and duration compared with earlier releases on the same platform.
Historical avg for .2.1 releases
68 days, 6.0 milestones
Based on 1 previous iOS .2.1 releases
| Version | Year | Cycle | Milestones | Avg. Interval |
|---|---|---|---|---|
| iOS 4.2.1 | 2010 | 68d | 6 | 14d |
Scroll horizontally to compare every historical field.