Samsung Galaxy Users Are Reporting One Key Issue After Updating To One UI 9

Samsung began rolling out the One UI 9 update to Galaxy S26 phones in September 2026, and more devices have gradually received the update since then. The update is expected to land on devices that are compatible with Android 17, which includes most Galaxy phones, tablets, and foldables released since 2023. The new features coming to your Samsung phone with One UI 9 include My FanCam, Now Brief, and other AI-powered conveniences, but there's a big caveat.

Many Samsung Galaxy users are reporting a huge increase in battery drain ever since One UI 9 was installed on their devices. These complaints primarily come from Galaxy S24 and S25 owners who received the update in one of Samsung's recent software rollouts. One S24 Ultra user shared their battery usage data on X, demonstrating that their phone battery drained by 95% after just over 3 hours and 15 minutes of screen-on time — and the most intensive task during that time was 37 minutes of watching YouTube.

It's actually common for smartphone batteries to drain faster after an update, but it should be a temporary problem that resolves after the setup process completes in the background. However, the number of reports appearing on Reddit and the Samsung community forums suggests that this may be a bigger issue that Samsung needs to address.

Much like any complex device that receives regular firmware upgrades, one of the biggest problems with Android phones is that software and system updates can be a mess. The rollout of One UI 9 is once again proving that belief to be true. In addition to the battery drain issue reported by S24 and S25 users, a highly disruptive bug was discovered on Galaxy S26 Ultra devices. Upon resetting the phone to factory settings after updating to One UI 9, the S26 Ultra may be unable to connect to Samsung's servers to complete setup (via Notebookcheck).

Fortunately, a survey conducted by Android Authority indicates that most Galaxy users who received the One UI 9 update have not encountered any bugs. But for those who have experienced serious problems, it's easy to feel helpless in the wake of a botched software update. The best way to fix common Samsung Galaxy phone problems after such an update is to simply wait it out. Third-party apps may not yet be well-optimized with the new software, and Samsung might address the known bugs and battery issues in a future update.