# Is Universal Android Debloater Next Generation Compatible with All Android Versions?

> Discover Universal Android Debloater Next Generation compatibility. Learn which Android versions support full and advanced debloating features for peak performance.

- Repository: [Universal-Debloater-Alliance/universal-android-debloater-next-generation](https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation)
- Tags: getting-started
- Published: 2026-06-18

---

**Universal Android Debloater Next Generation (UAD‑NG) can connect to any Android device that supports ADB, but core debloating functionality requires Android 5.0 (API 21) or newer, with advanced features restricted to Android 6.0 (API 23) and above.**

Universal Android Debloater Next Generation is an open-source tool that leverages the Android Debug Bridge (ADB) to remove bloatware from Android devices. While the application can detect and list any ADB-capable device, the **available debloating actions are gated by the Android SDK version** reported by the device. The source code explicitly implements version checks to ensure compatibility and prevent command failures on older devices.

## Minimum Android Version Requirements

The codebase distinguishes between basic device detection and actual debloating capabilities. This ensures that users cannot execute commands that would fail on unsupported Android versions.

### ADB Connection (All Versions)

UAD‑NG can detect and list any device that exposes an ADB interface. The `get_devices_list` function works regardless of Android version, allowing the application to see devices running legacy Android versions. However, detection alone does not guarantee functional debloating.

### Core Functionality (Android 5.0+, API 21)

Fundamental operations such as listing installed packages, enabling/disabling applications, and uninstalling user apps require **Android 5.0 Lollipop (API 21)** or newer. In [`crates/uad-core/src/sync.rs`](https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation/blob/main/crates/uad-core/src/sync.rs), the code defines a constant `MULTI_USER_SDK = 21` and uses the helper `supports_multi_user` to verify that `dev.android_sdk >= MULTI_USER_SDK` before executing multi-user aware commands.

### Advanced Commands (Android 6.0+, API 23)

Several powerful debloating features require **Android 6.0 Marshmallow (API 23)** or higher. The `apply_pkg_state_commands` function in [`sync.rs`](https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation/blob/main/sync.rs) explicitly checks `phone.android_sdk >= 23` before executing:

- `cmd package install-existing` (restoring uninstalled system apps)
- `pm hide` and `pm unhide` (advanced package hiding)
- Force-stop commands

Devices running API 21 or 22 receive fallback commands like `pm unblock` instead.

## How UAD‑NG Detects Android SDK Versions

The application reads the `ro.build.version.sdk` property via ADB to determine the exact Android version. In [`crates/uad-core/src/sync.rs`](https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation/blob/main/crates/uad-core/src/sync.rs), the `get_android_sdk` function handles this detection:

```rust
/// Returns the Android SDK version of a device.
pub fn get_android_sdk(device_serial: &str) -> u8 {
    AdbCommand::new()
        .shell(device_serial)
        .getprop("ro.build.version.sdk")
        .map_or(0, |sdk| sdk.parse().expect("SDK version numeral must be valid"))
}

```

This returns a `u8` representing the API level (e.g., `21` for Android 5.0, `23` for Android 6.0), which the application uses to gate functionality.

## SDK-Dependent Command Selection

UAD‑NG dynamically selects ADB commands based on the detected SDK version to maintain compatibility. The command selection logic in [`crates/uad-core/src/sync.rs`](https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation/blob/main/crates/uad-core/src/sync.rs) demonstrates this branching:

```rust
match phone.android_sdk {
    i if i >= 23 => vec!["cmd package install-existing"],
    21 | 22     => vec!["pm unhide"],
    _          => vec!["pm unblock", PM_CLEAR_PACK],
}

```

This pattern ensures that:
- **Android 6.0+ devices** use modern `cmd` commands
- **Android 5.0–5.1 devices** fall back to `pm unhide`
- **Older devices** (pre-API 21) receive basic `pm unblock` commands

## UI Adaptation Based on Device Version

The graphical interface adapts to prevent users from selecting unsupported actions. In [`crates/uad-gui/src/views/settings.rs`](https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation/blob/main/crates/uad-gui/src/views/settings.rs), the code disables or hides controls when the detected SDK is below 23:

```rust
let disable_checkbox_style = if phone.android_sdk >= 23 {
    // show full set of options
} else {
    // hide/disable options that require SDK >= 23
};

```

This prevents interface errors and command failures before they occur.

## CLI Version Reporting

When using the command-line interface, UAD‑NG exposes the Android SDK version directly to the user. The [`crates/uad-cli/src/commands.rs`](https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation/blob/main/crates/uad-cli/src/commands.rs) file prints the SDK level for each connected device, making it immediately apparent which features are available:

```rust
// CLI output includes Android SDK version
println!("Device: {} (SDK: {})", device_serial, android_sdk);

```

## Summary

- **Universal detection**: UAD‑NG can list any ADB-capable device regardless of Android version
- **Core debloating**: Requires Android 5.0 (API 21) or newer via the `MULTI_USER_SDK` check
- **Advanced features**: Require Android 6.0 (API 23) or newer, including `cmd package install-existing` and `pm hide`
- **Automatic adaptation**: The UI and command sets dynamically adjust based on `get_android_sdk` results
- **Source locations**: Version logic resides in [`crates/uad-core/src/sync.rs`](https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation/blob/main/crates/uad-core/src/sync.rs), UI adaptation in [`crates/uad-gui/src/views/settings.rs`](https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation/blob/main/crates/uad-gui/src/views/settings.rs), and CLI reporting in [`crates/uad-cli/src/commands.rs`](https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation/blob/main/crates/uad-cli/src/commands.rs)

## Frequently Asked Questions

### Does UAD‑NG work on Android 4.4 KitKat or older devices?

UAD‑NG can detect and list devices running Android 4.4 or older via ADB, but the debloating functionality is severely limited. The application requires Android 5.0 (API 21) for core multi-user support, and attempting to execute most package management commands on older devices will fail silently or fall back to basic `pm unblock` operations.

### What happens if I try to use advanced features on Android 5.0?

The interface prevents this scenario entirely. When `phone.android_sdk` is detected as 21 or 22, the GUI hides or disables controls for advanced features like package hiding and restoration. In the CLI, the command selection logic automatically substitutes compatible commands (such as `pm unhide` instead of `cmd package install-existing`) to ensure the operation succeeds with reduced functionality.

### How does UAD‑NG handle newer Android versions like Android 14 or 15?

UAD‑NG treats all devices with SDK 23 or higher as fully compatible. The `phone.android_sdk >= 23` check ensures that modern Android versions (including Android 14, 15, and future releases) receive the complete command set, including `cmd package install-existing` and advanced package management features.

### Where can I find my device's Android SDK version in UAD‑NG?

The CLI displays the SDK version immediately after connecting to a device in the terminal output. In the GUI, the application reads the `ro.build.version.sdk` property during device detection and uses it to determine which options to display, though the specific SDK number may be shown in device information panels or logs depending on the interface version.