Some Galaxy S24 and S25 Ultra owners are reporting unusually fast battery drain and high temperatures after the July 2026 security patch. This is not a Samsung diagnosis, and it does not mean every updated phone is affected. That distinction matters: the first sensible move is not a factory reset, but working out whether you have a short-lived post-update spike or a process that is genuinely running out of bounds.
Android Central collected reports posted on Samsung Community, mostly involving S24 Ultra, S24+ and S25 Ultra devices. They describe rapid standby drain or heat without an obvious workload. A community thread is a primary record of a user’s report, not a manufacturer bulletin, so it cannot establish a universal cause. It is enough, however, to replace the cache-clearing ritual with a small, repeatable check.
What you need before you start
- A recently updated Galaxy S24, S24+, S24 Ultra, S25 or S25 Ultra.
- Charging access and Wi-Fi for app updates.
- Two screenshots: software version and battery-usage screen.
- A few hours of ordinary use, without benchmarks, gaming or hotspot use distorting the comparison.
1. Record the installed version
- Open Settings > Software update and note the date of the most recent update.
- Go to Settings > About phone > Software information and save a screenshot of the build version and security patch level.
- Open Galaxy Store and Play Store, then install available app updates. An app left behind after a system update is a much more ordinary explanation than haunted firmware.
This also makes a later support report useful. Without the build, patch date and exact model, a Samsung Members report saying “the battery is bad” has very limited diagnostic value.
2. Measure the symptom
Open Settings > Battery and inspect which apps have used the most power since the last full charge. Look for an app at the top of the list while the phone was idle, unusually high background usage, and a time window that matches the heat. Then compare one normal overnight idle period with the previous 24 hours. A single peak immediately after an OTA can come from optimisation, indexing or synchronisation; repeated standby drain needs closer attention.
Also check whether the problem coincides with cloud backups, large photo restores or Wi-Fi transfers. Those processes do not automatically excuse the patch, but they make the test repeatable. If the spike returns at the same time with the same app, you have something concrete to give support.
3. Isolate reversible causes
- Restart the phone once, then let it settle for a few hours. Rebooting repeatedly does not create better evidence.
- Temporarily turn off hotspot use, continuous GPS navigation, heavy downloads and fast charging while you assess the temperature.
- Under Settings > Battery, open the highest-usage apps and check whether they have unrestricted background access. Do not randomly restrict authenticator, critical messaging or wearable apps; inspect the consumption first.
- Check Play Store and Galaxy Store for an update to the app using the most battery.
If the phone becomes too hot to use comfortably, stop charging it, remove a particularly insulating case and let it cool in a ventilated room. Do not use a freezer, ice or social-media remedies: moisture is not a software fix.
When not to factory-reset
A factory reset is not the first test for a problem that appeared after a patch. It destroys context that might help identify the issue, creates hours of restoration work and can temporarily hide a process that returns with the first sync. Capture screenshots, record the model and build, update apps and observe a full use cycle first.
If abnormal drain persists in standby, heat remains high or you see reboots, submit a Samsung Members report with the time of the symptom, battery screenshots, model and build. If the battery swells, the device smells unusual or charging heat is excessive, stop using it and contact service. That is no longer a settings problem.
What actually changes
The fresh fact is not proof that “the July patch breaks Galaxy phones”, a phrase that is only useful for feeding comment threads. It is that there are consistent reports on specific models, and users can document their own case without discarding data or time. A sound check separates measured battery drain from an impression, a misbehaving app from a system fault, and a recoverable bug from a service case.
In brief
- Reports concern some Galaxy S24/S25 phones, especially Ultra models, after the July 2026 patch.
- Samsung had not published an official diagnosis when this guide was checked.
- Before resetting, record the build and patch, update apps and watch standby usage.
- Capture screenshots and symptom times; they are more useful than random reboots.
- Escalate persistent heat, reboots or physical battery symptoms to Samsung Members or service.
Sources
- Android Central — July 30, 2026
- Samsung Community — primary user report, checked July 31, 2026