Release record
Release notes
Editorial synthesis with inline references and a source ledger when citations are available.
Apple’s archived security index dates iPhone OS 3.0.1 to July 31, 2009. The corresponding advisory identifies one documented change: safer decoding of SMS messages in CoreTelephony.[1][2]
Apple said a crafted SMS could previously interrupt service or execute code. This article does not infer unrelated maintenance changes, feature additions, or an undocumented build record.[1]
Source ledger
Sources are linked to the claims they support. Publication and access dates are shown when available.
Apple Support · 2009-07-31T00:00:00Z · CoreTelephony — CVE-2009-2204
Apple Support · Apple · 2026-07-30 · iOS 3.0.1 — 31 July 2009
Apple Support · 2009-07-31T00:00:00Z · iOS 3.0.1 security content
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.
security · fixed
The focused update corrected a memory-corruption flaw that Apple said could cause a service interruption or arbitrary code execution when a malicious SMS arrived.
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 iPhone OS 3.0.1 update was a focused CoreTelephony security release correcting malicious SMS message handling.
Historical context
Pace, intervals, and duration compared with earlier releases on the same platform.
Historical avg for .0.1 releases
8 days, 3.0 milestones
Based on 1 previous iOS .0.1 releases
| Version | Year | Cycle | Milestones | Avg. Interval |
|---|---|---|---|---|
| iOS 5.0.1 | 2011 | 8d | 3 | 4d |
Scroll horizontally to compare every historical field.