# Is it safe to disable system apps on Android?

Disabling a system app is reversible and usually safe if the app is optional, such as a duplicate browser or a manufacturer assistant you never use. It is not safe for the launcher, keyboard, System UI, telephony or Play services.

## The tiers slimdroid uses

| Tier | Meaning | Advice |
| --- | --- | --- |
| Critical | The phone stops working without it: launcher, keyboard, System UI, telephony. | Never disable. |
| Core | Part of a feature you may use: Bluetooth, NFC, backup, device care. | Disable only if you do not use the feature. |
| Judgement call | Useful to some people and not others. | Read the reason, decide, test. |
| Bloat | Preinstalled and optional: duplicate apps, partner apps, promotional services. | Safe to disable for most people. |
| Your app | Something you installed. | Not debloat material. |
| Unknown | Not in the knowledge base. | Leave it alone until you know what it is. |

## Rules of thumb

- Disable a few packages at a time, restart, and use the phone for a day before the next batch.
- Names containing `provider`, `framework`, `systemui`, `telephony` or `permissioncontroller` are almost always load-bearing.
- Prefer disabling over uninstalling; both are reversible but disabling is the simplest to undo.
- Keep a list of what you changed. The slimdroid journal records every command and its result.
- Back up anything you care about first. "Clear data" has no undo.

## How to undo a mistake

1. Restore the package from the journal in the [slimdroid tool](https://slimdroid.com/app), or run `adb shell pm enable <package>`.
2. If you used uninstall for your user, run `adb shell cmd package install-existing <package>`.
3. If the phone will not boot properly, connect it over ADB and restore the last package you changed; a factory reset is the final option.

### Is it safe to disable Bixby?

For most people, yes: Bixby is a Samsung assistant. Features that depend on it, such as Bixby Routines, stop working, and you can switch it back on at any time.

### Can disabling an app delete my data?

Disabling keeps the app's data. Clearing data deletes it and cannot be undone.

## Related guides

- [How to debloat an Android phone without root](https://slimdroid.com/guides/debloat-android-without-root)
- [Android privacy: which apps collect data and how to limit them](https://slimdroid.com/guides/android-privacy-telemetry-apps)
- [Android debloat tools compared](https://slimdroid.com/guides/debloat-tools-compared)
- [Samsung bloatware: what is safe to disable on a Galaxy phone](https://slimdroid.com/guides/samsung-bloatware-what-to-disable)
- [Xiaomi, Redmi and POCO bloatware and ads: what to disable](https://slimdroid.com/guides/xiaomi-redmi-poco-bloatware-ads)