Owners Flagship devices of yesteryear are often faced with the dilemma of whether to continue using a favorite gadget or to replace it due to outdated software. For Samsung Galaxy S9, released in 2018, this issue is especially acute, since the smartphone has long been the standard for performance and shooting quality. However, the South Korean giant's update policy has a clear time frame, which has already expired for this model.
Official software support for Samsung S9 has ended with the version Android 10 with shell One UI 2.5. This means that users will not receive official updates to Android 11, Android 12 or later versions directly from the manufacturer. Despite this, the device continues to receive rare security updates, although their frequency has decreased significantly compared to the first years of the smartphone's life.
Understanding the current firmware status is critical to assessing the security of your data and compatibility with modern applications. Many banking apps and services are beginning to gradually abandon support for older versions of the operating system, which can create inconvenience in everyday use. Let's take a closer look at what exactly the end of support means and what solutions exist for enthusiasts.
Official update limit and current software status
The Company Samsung traditionally provides two major operating system updates for its flagships of that period. Galaxy S9originally released on Android 8.0 Oreo, consistently received updates to Android 9 Pie and the final version Android 10. At this point, the cyclical update of major OS versions was stopped by the developers.
It is important to distinguish between version updates Android and security patches. Even after the main OS has ceased support, the manufacturer may release patches for vulnerabilities. For S9 such patches were released irregularly, sometimes with a delay of several months. Users can check the relevance of their software by going to menu Settings → Software update → Download and installation.
⚠️ Attention: Official update servers may stop checking for new patches for older models. If the update menu reports that the software is up to date, but the security patch date is older than six months, most likely, support has been completely discontinued.
The lack of new interface features One UI becomes noticeable over time. New navigation gestures, improved multi-window functionality, and modern widgets available on Android 11-14will remain unavailable in stock firmware. This does not make the phone useless, but it limits its functional potential compared to new devices.
The final official version for Samsung S9 is Android 10 (One UI 2.5). Major OS updates are no longer planned.
Consequences of using an outdated version of Android
Using a smartphone based on Android 10 in 2026-2026 carries certain risks that cannot be ignored. Firstly, this concerns the security of personal data. New viruses and phishing methods often exploit vulnerabilities that were closed in more recent versions of the system, but remain open in older versions.
Secondly, application compatibility becomes an issue. Developers of popular software, such as instant messengers, social networks and banking clients, are gradually increasing the minimum requirements for the OS version. For example, some new functions WhatsApp or banking applications may stop working correctly or may not be installed at all due to Google Play.
- 📉 Security: Increased risk of hacking due to the lack of fresh patches for system kernel vulnerabilities.
- 📱 Compatibility: Failure of popular applications to support old versions of the operating API systems.
- 🐌 Performance: New versions of applications may run slower on older software due to lack of optimization.
However, for basic tasks - making calls, listening to music, viewing photos and using a navigator - the current version is quite enough. The system core remains stable, and optimization Samsung allows the device to work smoothly in everyday scenarios.
Custom firmware options and bootloader unlocking
For tech-savvy users, there is an alternative - installing custom firmware. The developer community XDA Developers supports the model Galaxy S9 (codename starlte for the version with an Exynos processor) is quite active. This allows you to install Android 11, 12, 13 even test builds Android 14.
However, there is a critical limitation that you need to know about in advance. In the US region and some other countries, a version with a processor was sold. The bootloader of these devices is locked at the hardware level, which makes installing custom firmware impossible without complex and risky manipulations, which often lead to bricking the device. Samsung S9 with processor Snapdragon 845. The bootloader of these devices is locked at the hardware level, which makes installing custom firmware impossible without complex and risky manipulations, which often lead to bricking the device.
Checking the model: Settings → About phone → Model numberG960F/DS - Exynos (unlocked)
G960U - Snapdragon (locked)
If you have the version on Exynos, the procedure for unlocking the bootloader is relatively simple, but it entails triggering the counter Knox. This is an irreversible process that will permanently disable the protected Samsung board, including the operation of Samsung Pay, Secure Folder and some banking applications, even after returning to stock.
What is a Knox counter?
The Knox counter (0x1) is a physical fuse in the smartphone board. When the bootloader is unlocked, it is burned. This action cannot be reversed programmatically, and it deprives the device of a warranty and access to protected functions of the Samsung ecosystem.
Risks and cautions when installing firmware yourself
The process of installing custom software requires a deep understanding of the architecture Android. A mistake at any stage, from selecting the wrong recovery file to a power failure while recording, can turn your phone into a useless piece of plastic. Recovery after unsuccessful firmware is possible through the mode Download Mode and app Odin, but this does not guarantee success.
⚠️ Attention: Before any manipulations with memory partitions, be sure to create a full backup copy of the data to an external drive. The internal memory will be completely cleared during the bootloader unlocking process.
Custom firmwares, such as LineageOS or Pixel Experience, often lack some camera-specific drivers. Samsung. The quality of photos may deteriorate significantly compared to stock firmware, since image processing algorithms are closely related to specific hardware and software version.
- 🔒 Data security: Risk of losing personal information if the flashing process is unsuccessful.
- 📷 Camera: Possible reduction in image quality and loss of functions like Super Slow-mo.
- 💳 Banks: Many applications may not work on rooted devices or with an unlocked bootloader.
It is also worth considering that support for custom firmware depends on enthusiasts. If the lead developer of the project loses interest or the device, the project may be abandoned and you will be left with a half-baked version of the software without security updates.
Use the Samsung Smart Switch app on your PC to create a full backup before starting any experiments with the firmware. This will save not only the photo, but also the layout of the home screen.
Comparison of the characteristics of the stock and custom system
To make an informed decision, it is worth comparing what you lose and what you gain when switching to a custom build. The stock shell One UI offers unique features that are difficult to implement in third-party projects. At the same time, clean Android gives a performance boost and a fresh interface.
| Characteristics | Stock One UI 2.5 | Custom (LineageOS/Pixel) |
|---|---|---|
| Android version | 10 (Officially) | 11-14 (Unofficial) |
| Security (Knox) | Full protection | Disabled forever |
| Camera | Original quality | Average (depending on GCam ports) |
| Performance | Stable, with proprietary add-ons | High, |