My Umidigi G9x suddenly started acting up after a recent update, and now I’m dealing with performance issues and random glitches. I’ve tried basic troubleshooting, but nothing has fixed it, and I really need help figuring out what went wrong and how to get my phone working normally again.
Sounds like the update borked something. I’d do this in order.
- Check storage first. Keep at least 15 to 20 percent free. If you’re under 5 GB free, phones start lagging and apps glitch.
- Boot into safe mode. If the glitches stop, one of your apps is the problem, not the phone itself.
- Wipe the cache of the worst apps, Chrome, Play Services, launcher, camera, social apps.
- Update all apps from Play Store. Old app versions after a system update often break stuff.
- Reset app preferences. This fixes weird permission and default app issues.
- If battery drain and stutter started right after the update, leave it on charge and Wi-Fi for an hour or two. Android sometimes re-indexes files after updates.
- If none of that helps, back up your stuff and do a factory reset. Annoying, yeah, but it fixes a lot of post-update messes.
If the phone still glitches after a clean reset, the update itself is bad or your storage chip is starting to fail. At taht point, I’d look for the stock ROM for the G9x and reflash it, if Umidigi even posted one. If not, contact support, though theyre usually slow.
One thing I’d add to what @waldgeist said: check Developer options and turn off anything weird that may have been toggled by the update or by accident. Stuff like animation scale set wrong, forced GPU rendering, background process limit, or “don’t keep activities” can make a phone feel absolutely busted. If Dev options are on, I’d honestly just reset them to default.
Also, I kinda disagree on jumping straight to reflashing unless you already know what you’re doing. On a Umidigi, that can get annoying fast if drivers/tools are flaky. Before that, look at battery health / thermals. If the phone is getting hot doing basic stuff, the update may have a rogue process stuck in the background. In Settings, check battery usage by app and see if one app or Android System is eating everything.
Another thing people miss: mobile network issues after updates. If signal got worse, the phone can lag and drain battery while hunting for towers. Reset network settings and test on Wi-Fi only for a bit.
If glitches include touch problems, camera freezes, random reboots, or app crashes across the whole system, try running the built-in diagnostics if Umidigi included any. If not, test hardware basics: charger, cable, SD card removed, SIM reseated. A dying SD card can make a phone go all stupid, no joke.
If you already did the usual stuff and it’s still janky, I’d suspect the update itself more than “user error.” Cheap-ish phones sometimes get one bad OTA and thats all it takes.
I’d go one layer deeper than @waldgeist and the other reply: check whether the update broke the storage layer, not just the apps.
A few things that often get missed on the Umidigi G9x:
-
Free space
If internal storage is nearly full, Android gets weird fast after updates. Keep at least 10 to 15 GB free if you can. Also clear the Downloads folder and old update packages. -
Safe Mode test
Boot into Safe Mode and use it for 10 minutes. If the lag/glitches mostly stop, it’s probably a third-party app conflict, not the firmware itself. That’s more useful than randomly uninstalling stuff. -
App reset instead of full factory reset
Go to Settings and reset app preferences. This can fix broken permissions, disabled system apps, and notification/services issues without wiping your data. I actually think this is worth trying before a full reset. -
Google Play system update
People check Android version but forget the Play system update. If that’s half-applied, you can get crashes, UI bugs, and odd security component behavior. -
Accessibility services
Check if any cleaner, booster, overlay, auto-clicker, or accessibility-based app is active. Those can absolutely wreck performance after an OTA. -
Scoped storage / SD migration issues
If apps were moved to SD previously, move them back to internal storage for testing. Cheap cards plus post-update reindexing can cause constant stutter.
If none of that changes anything, then back up your stuff and do a factory reset without restoring all apps immediately. That last part matters. Restoring everything at once can re-import the problem.
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