What Is an Android Security Patch Level?
Every Android device displays a Security Patch Level (SPL) — a date-formatted string (e.g., 2025-04-01) found in Settings → About Phone → Android Security Patch Level. This date tells you which set of security fixes your device currently has installed.
Google releases security patches on a monthly basis, addressing discovered vulnerabilities in Android's core components. These patches cover everything from kernel-level exploits to bugs in Bluetooth, Wi-Fi, and media processing subsystems.
How the Patch System Works
The Android security update process involves multiple layers:
- Google discovers or receives vulnerability reports — through its own security team, Project Zero, or responsible disclosures from external researchers.
- Google patches the Android Open Source Project (AOSP) — fixes are applied to the core Android codebase.
- Manufacturers adapt the patches — companies like Samsung, Xiaomi, and OPPO must integrate Google's patches into their own modified Android versions (One UI, MIUI, etc.) and test them on their hardware.
- Carriers may add additional testing delays — carrier-locked devices sometimes receive patches weeks after unlocked variants.
- Users receive the update OTA or via manual download.
The Two Monthly Patch Strings
You may notice Android security patches come in two variants each month:
- YYYY-MM-01 — Covers patches for the Android framework and Google Play system components.
- YYYY-MM-05 — Includes everything from the -01 set plus additional kernel and device-specific patches.
A device showing a -05 patch date has received the full monthly set. A -01 date means the device received partial patches for that month.
Security Patch Levels by Device Tier
| Device Type | Typical Update Frequency | Example Brands |
|---|---|---|
| Flagship (current gen) | Monthly or near-monthly | Samsung S-series, Google Pixel |
| Mid-range | Quarterly | Xiaomi, Motorola, Nokia |
| Budget | Infrequent / irregular | Various lesser-known brands |
| End-of-life devices | None (manufacturer support ended) | Older models across all brands |
Why Security Patch Levels Matter
Running outdated patches creates real risks:
- Exploitable vulnerabilities: Once a patch is publicly released, the underlying vulnerability details become known. Unpatched devices remain exposed to these known exploits.
- Malware targeting old flaws: Cybercriminals actively exploit known, unpatched vulnerabilities — especially in older Android versions.
- Banking and enterprise apps: Some apps check the security patch level and may restrict functionality on significantly outdated devices.
- Zero-day risk: Devices with old patches have a larger accumulated attack surface.
How to Check and Update Your Security Patch Level
Checking Your Current Patch Level
- Open Settings.
- Tap About Phone.
- Look for Android Security Patch Level or Security Patch.
Installing Available Updates
- Go to Settings → System → System Update (or Software Update on Samsung).
- Tap Check for Updates.
- If an update is available, download and install it over Wi-Fi.
- Allow the device to restart and complete installation.
What If Your Device No Longer Receives Patches?
When a manufacturer ends software support for a device, security patches stop. Your options at that point include:
- Upgrade your device — the most straightforward solution for continued security.
- Install a supported custom ROM — projects like LineageOS and GrapheneOS continue patching many devices long after manufacturer support ends. Note this requires bootloader unlocking.
- Minimize risk — avoid installing untrusted apps, use a separate device for sensitive activities, and consider a VPN.
Final Thoughts
Security patch levels are a straightforward indicator of how protected your Android device is against known threats. Make it a habit to check your patch level monthly and apply available updates promptly. For devices no longer receiving patches, evaluate your options — whether that's upgrading hardware or exploring community-supported firmware alternatives.