diff --git a/manager/app/src/main/java/me/weishu/kernelsu/ui/screen/Flash.kt b/manager/app/src/main/java/me/weishu/kernelsu/ui/screen/Flash.kt
index 3d18901e..3a1a8074 100644
--- a/manager/app/src/main/java/me/weishu/kernelsu/ui/screen/Flash.kt
+++ b/manager/app/src/main/java/me/weishu/kernelsu/ui/screen/Flash.kt
@@ -137,7 +137,7 @@ fun FlashScreen(navigator: DestinationsNavigator, flashIt: FlashIt) {
 
 @Parcelize
 sealed class FlashIt : Parcelable {
-    data class FlashBoot(val bootUri: Uri? = null, val koUri: Uri, val ota: Boolean) : FlashIt()
+    data class FlashBoot(val bootUri: Uri? = null, val ota: Boolean) : FlashIt()
 
     data class FlashModule(val uri: Uri) : FlashIt()
 }
@@ -150,7 +150,6 @@ fun flashIt(
     when (flashIt) {
         is FlashIt.FlashBoot -> installBoot(
             flashIt.bootUri,
-            flashIt.koUri,
             flashIt.ota,
             onFinish,
             onStdout,
diff --git a/manager/app/src/main/java/me/weishu/kernelsu/ui/screen/Install.kt b/manager/app/src/main/java/me/weishu/kernelsu/ui/screen/Install.kt
index bb7a6766..e50362d5 100644
--- a/manager/app/src/main/java/me/weishu/kernelsu/ui/screen/Install.kt
+++ b/manager/app/src/main/java/me/weishu/kernelsu/ui/screen/Install.kt
@@ -57,55 +57,17 @@ import me.weishu.kernelsu.ui.util.rootAvailable
 @Destination
 @Composable
 fun InstallScreen(navigator: DestinationsNavigator) {
-    val scope = rememberCoroutineScope()
-    val loadingDialog = rememberLoadingDialog()
-    val context = LocalContext.current
     var installMethod by remember {
         mutableStateOf<InstallMethod?>(null)
     }
 
-    val onFileDownloaded = { uri: Uri ->
-
-        installMethod?.let {
-            scope.launch(Dispatchers.Main) {
-                when (it) {
-                    InstallMethod.DirectInstall -> {
-                        navigator.navigate(
-                            FlashScreenDestination(
-                                FlashIt.FlashBoot(
-                                    null,
-                                    uri,
-                                    false
-                                )
-                            )
-                        )
-                    }
-
-                    InstallMethod.DirectInstallToInactiveSlot -> {
-                        navigator.navigate(
-                            FlashScreenDestination(
-                                FlashIt.FlashBoot(
-                                    null,
-                                    uri,
-                                    true
-                                )
-                            )
-                        )
-                    }
-
-                    is InstallMethod.SelectFile -> {
-                        navigator.navigate(
-                            FlashScreenDestination(
-                                FlashIt.FlashBoot(
-                                    it.uri,
-                                    uri,
-                                    false
-                                )
-                            )
-                        )
-                    }
-                }
-            }
+    val onClickInstall = {
+        installMethod?.let { method ->
+            val flashIt = FlashIt.FlashBoot(
+                if (method is InstallMethod.SelectFile) method.uri else null,
+                method is InstallMethod.DirectInstallToInactiveSlot
+            )
+            navigator.navigate(FlashScreenDestination(flashIt))
         }
     }
 
@@ -124,45 +86,11 @@ fun InstallScreen(navigator: DestinationsNavigator) {
                     .fillMaxWidth()
                     .padding(16.dp)
             ) {
-
-                DownloadListener(context = context) { uri ->
-                    onFileDownloaded(uri)
-                    loadingDialog.hide()
-                }
-
-                val failedMessage = stringResource(id = R.string.failed_to_fetch_lkm_url)
-                val downloadingMessage = stringResource(id = R.string.downloading)
                 Button(
                     modifier = Modifier.fillMaxWidth(),
                     enabled = installMethod != null,
                     onClick = {
-                        loadingDialog.showLoading()
-                        scope.launch(Dispatchers.IO) {
-                            getLKMUrl().onFailure { throwable ->
-                                loadingDialog.hide()
-                                scope.launch(Dispatchers.Main) {
-                                    Toast.makeText(
-                                        context,
-                                        failedMessage.format(throwable.message),
-                                        Toast.LENGTH_SHORT
-                                    ).show()
-                                }
-                            }.onSuccess { result ->
-                                download(
-                                    context = context,
-                                    url = result.second,
-                                    fileName = result.first,
-                                    description = downloadingMessage.format(
-                                        result.first
-                                    ),
-                                    onDownloaded = { uri ->
-                                        onFileDownloaded(uri)
-                                        loadingDialog.hide()
-                                    },
-                                    onDownloading = {}
-                                )
-                            }
-                        }
+                        onClickInstall()
                     }) {
                     Text(
                         stringResource(id = R.string.install_next),
diff --git a/manager/app/src/main/java/me/weishu/kernelsu/ui/util/KsuCli.kt b/manager/app/src/main/java/me/weishu/kernelsu/ui/util/KsuCli.kt
index 821d96d4..712c3ea6 100644
--- a/manager/app/src/main/java/me/weishu/kernelsu/ui/util/KsuCli.kt
+++ b/manager/app/src/main/java/me/weishu/kernelsu/ui/util/KsuCli.kt
@@ -143,7 +143,6 @@ fun installModule(
 
 fun installBoot(
     bootUri: Uri?,
-    lkmUri: Uri,
     ota: Boolean,
     onFinish: (Boolean) -> Unit,
     onStdout: (String) -> Unit,
@@ -151,73 +150,60 @@ fun installBoot(
 ): Boolean {
     val resolver = ksuApp.contentResolver
 
-    with(resolver.openInputStream(lkmUri)) {
-        val lkmFile = File(ksuApp.cacheDir, "kernelsu.ko")
-        lkmFile.outputStream().use { output ->
-            this?.copyTo(output)
-        }
-
-        if (!lkmFile.exists()) {
-            onStdout("- kernelsu.ko not found")
-            onFinish(false)
-            return false
-        }
-
-        val bootFile = bootUri?.let { uri ->
-            with(resolver.openInputStream(uri)) {
-                val bootFile = File(ksuApp.cacheDir, "boot.img")
-                bootFile.outputStream().use { output ->
-                    this?.copyTo(output)
-                }
-
-                bootFile
+    val bootFile = bootUri?.let { uri ->
+        with(resolver.openInputStream(uri)) {
+            val bootFile = File(ksuApp.cacheDir, "boot.img")
+            bootFile.outputStream().use { output ->
+                this?.copyTo(output)
             }
+
+            bootFile
         }
-
-        val magiskboot = File(ksuApp.applicationInfo.nativeLibraryDir, "libmagiskboot.so")
-        var cmd = "boot-patch -m ${lkmFile.absolutePath} --magiskboot ${magiskboot.absolutePath}"
-
-        cmd += if (bootFile == null) {
-            // no boot.img, use -f to force install
-            " -f"
-        } else {
-            " -b ${bootFile.absolutePath}"
-        }
-
-        if (ota) {
-            cmd += " -u"
-        }
-
-        // output dir
-        val downloadsDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
-        cmd += " -o $downloadsDir"
-
-        val shell = createRootShell()
-
-        val stdoutCallback: CallbackList<String?> = object : CallbackList<String?>() {
-            override fun onAddElement(s: String?) {
-                onStdout(s ?: "")
-            }
-        }
-
-        val stderrCallback: CallbackList<String?> = object : CallbackList<String?>() {
-            override fun onAddElement(s: String?) {
-                onStderr(s ?: "")
-            }
-        }
-
-        val result =
-            shell.newJob().add("${getKsuDaemonPath()} $cmd").to(stdoutCallback, stderrCallback)
-                .exec()
-        Log.i("KernelSU", "install boot $lkmUri result: ${result.isSuccess}")
-
-        lkmFile.delete()
-        bootFile?.delete()
-
-        // if boot uri is empty, it is direct install, when success, we should show reboot button
-        onFinish(bootUri == null && result.isSuccess)
-        return result.isSuccess
     }
+
+    val magiskboot = File(ksuApp.applicationInfo.nativeLibraryDir, "libmagiskboot.so")
+    var cmd = "boot-patch --magiskboot ${magiskboot.absolutePath}"
+
+    cmd += if (bootFile == null) {
+        // no boot.img, use -f to force install
+        " -f"
+    } else {
+        " -b ${bootFile.absolutePath}"
+    }
+
+    if (ota) {
+        cmd += " -u"
+    }
+
+    // output dir
+    val downloadsDir =
+        Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
+    cmd += " -o $downloadsDir"
+
+    val shell = createRootShell()
+
+    val stdoutCallback: CallbackList<String?> = object : CallbackList<String?>() {
+        override fun onAddElement(s: String?) {
+            onStdout(s ?: "")
+        }
+    }
+
+    val stderrCallback: CallbackList<String?> = object : CallbackList<String?>() {
+        override fun onAddElement(s: String?) {
+            onStderr(s ?: "")
+        }
+    }
+
+    val result =
+        shell.newJob().add("${getKsuDaemonPath()} $cmd").to(stdoutCallback, stderrCallback)
+            .exec()
+    Log.i("KernelSU", "install boot result: ${result.isSuccess}")
+
+    bootFile?.delete()
+
+    // if boot uri is empty, it is direct install, when success, we should show reboot button
+    onFinish(bootUri == null && result.isSuccess)
+    return result.isSuccess
 }
 
 fun reboot(reason: String = "") {
@@ -250,7 +236,8 @@ fun isInitBoot(): Boolean {
         return file.exists()
     }
     // https://source.android.com/docs/core/architecture/partitions/generic-boot
-    return ShellUtils.fastCmd(shell, "getprop ro.product.first_api_level").trim().toInt() >= Build.VERSION_CODES.TIRAMISU
+    return ShellUtils.fastCmd(shell, "getprop ro.product.first_api_level").trim()
+        .toInt() >= Build.VERSION_CODES.TIRAMISU
 }
 
 fun overlayFsAvailable(): Boolean {
diff --git a/manager/app/src/main/res/values-ar/strings.xml b/manager/app/src/main/res/values-ar/strings.xml
index f1de4621..4bcdd119 100644
--- a/manager/app/src/main/res/values-ar/strings.xml
+++ b/manager/app/src/main/res/values-ar/strings.xml
@@ -109,8 +109,6 @@
     <string name="enable_web_debugging">تمكين تصحيح أخطاء WebView</string>
     <string name="enable_web_debugging_summary">يمكن استخدامه لتصحيح أخطاء WebUI، يرجى تمكينه فقط عند الحاجة.</string>
     <string name="install_next">التالي</string>
-    <string name="failed_to_fetch_lkm_url">فشل جلب رابط LKM: %1$s</string>
-    <string name="downloading">تحميل %1$s</string>
     <string name="select_file">اختيار ملف</string>
     <string name="direct_install">تثبيت مباشر (موصى به)</string>
     <string name="install_inactive_slot">التثبيت على فتحة غير نشطة (بعد OTA)</string>
diff --git a/manager/app/src/main/res/values-fr/strings.xml b/manager/app/src/main/res/values-fr/strings.xml
index 204250bf..8532ee1d 100644
--- a/manager/app/src/main/res/values-fr/strings.xml
+++ b/manager/app/src/main/res/values-fr/strings.xml
@@ -116,6 +116,4 @@
 \nN\'utilisez cette option qu\'une fois la mise à jour OTA terminée.
 \nContinuer ?</string>
     <string name="install_next">Suivant</string>
-    <string name="downloading">Téléchargement de %1$s</string>
-    <string name="failed_to_fetch_lkm_url">Échec de la récupération de l\'URL du LKM : %1$s</string>
 </resources>
\ No newline at end of file
diff --git a/manager/app/src/main/res/values-pt-rBR/strings.xml b/manager/app/src/main/res/values-pt-rBR/strings.xml
index d9719a5e..79c91c39 100644
--- a/manager/app/src/main/res/values-pt-rBR/strings.xml
+++ b/manager/app/src/main/res/values-pt-rBR/strings.xml
@@ -115,7 +115,5 @@
     <string name="install_inactive_slot_warning">Seu dispositivo será FORÇADO a inicializar no slot inativo atual após uma reinicialização!
 \nSó use esta opção após a conclusão do OTA.
 \nDeseja continuar?</string>
-    <string name="downloading">Baixando %1$s</string>
     <string name="install_next">Próximo</string>
-    <string name="failed_to_fetch_lkm_url">Falha ao buscar a URL do LKM: %1$s</string>
 </resources>
\ No newline at end of file
diff --git a/manager/app/src/main/res/values-ru/strings.xml b/manager/app/src/main/res/values-ru/strings.xml
index a79df296..5e02165b 100644
--- a/manager/app/src/main/res/values-ru/strings.xml
+++ b/manager/app/src/main/res/values-ru/strings.xml
@@ -112,8 +112,6 @@
     <string name="open">Открыть</string>
     <string name="enable_web_debugging">Включить отладку WebView</string>
     <string name="enable_web_debugging_summary">Используется для отладки веб-интерфейса. Пожалуйста, включайте только при необходимости.</string>
-    <string name="downloading">Загрузка %1$s</string>
-    <string name="failed_to_fetch_lkm_url">Не удалось получить LKM по адресу: %1$s</string>
     <string name="direct_install">Прямая установка (Рекомендуется)</string>
     <string name="install_inactive_slot">Установка в неактивный слот (После OTA)</string>
     <string name="install_next">Далее</string>
diff --git a/manager/app/src/main/res/values-tr/strings.xml b/manager/app/src/main/res/values-tr/strings.xml
index 0cb8421a..6e2e19a9 100644
--- a/manager/app/src/main/res/values-tr/strings.xml
+++ b/manager/app/src/main/res/values-tr/strings.xml
@@ -117,6 +117,4 @@
 \nBu seçeneği yalnızca OTA tamamlandıktan sonra kullanın.
 \nDevam edilsin mi?</string>
     <string name="install_next">Sonraki</string>
-    <string name="failed_to_fetch_lkm_url">LKM URL\'si getirilemedi: %1$s</string>
-    <string name="downloading">%1$s indiriliyor</string>
 </resources>
\ No newline at end of file
diff --git a/manager/app/src/main/res/values-zh-rCN/strings.xml b/manager/app/src/main/res/values-zh-rCN/strings.xml
index 41d1a0bb..388ed0c2 100644
--- a/manager/app/src/main/res/values-zh-rCN/strings.xml
+++ b/manager/app/src/main/res/values-zh-rCN/strings.xml
@@ -113,7 +113,5 @@
     <string name="install_inactive_slot">安装到未使用的槽位（OTA 后）</string>
     <string name="install_inactive_slot_warning">将在重启后强制切换到另一个槽位！\n注意只能在 OTA 更新完成后的重启之前使用。\n确认？</string>
     <string name="install_next">下一步</string>
-    <string name="failed_to_fetch_lkm_url">获取 LKM 链接失败：%1$s</string>
-    <string name="downloading">正在下载：%1$s</string>
     <string name="select_file_tip">建议选择 %1$s 分区镜像</string>
 </resources>
\ No newline at end of file
diff --git a/manager/app/src/main/res/values-zh-rTW/strings.xml b/manager/app/src/main/res/values-zh-rTW/strings.xml
index 8d427d3d..609e2ba3 100644
--- a/manager/app/src/main/res/values-zh-rTW/strings.xml
+++ b/manager/app/src/main/res/values-zh-rTW/strings.xml
@@ -115,6 +115,4 @@
 \n請問是否繼續？</string>
     <string name="direct_install">直接安裝（建議）</string>
     <string name="install_next">下一步</string>
-    <string name="failed_to_fetch_lkm_url">取得 LKM 下載鏈接失敗：%1$s</string>
-    <string name="downloading">正在下載：%1$s</string>
 </resources>
\ No newline at end of file
diff --git a/manager/app/src/main/res/values/strings.xml b/manager/app/src/main/res/values/strings.xml
index 04d95a2b..e7533f44 100644
--- a/manager/app/src/main/res/values/strings.xml
+++ b/manager/app/src/main/res/values/strings.xml
@@ -115,7 +115,5 @@
     <string name="install_inactive_slot">Install to Inactive Slot (After OTA)</string>
     <string name="install_inactive_slot_warning">Your device will be **FORCED** to boot to the current inactive slot after a reboot!\nOnly use this option after OTA is done.\nContinue?</string>
     <string name="install_next">Next</string>
-    <string name="failed_to_fetch_lkm_url">Failed to fetch LKM url: %1$s</string>
-    <string name="downloading">Downloading %1$s</string>
     <string name="select_file_tip">%1$s partition image is recommended</string>
 </resources>