diff --git a/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/Flash.kt b/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/Flash.kt
index 932b438a..eefa9a53 100644
--- a/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/Flash.kt
+++ b/manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/Flash.kt
@@ -59,6 +59,7 @@ import kotlinx.coroutines.withContext
 import kotlinx.parcelize.Parcelize
 import com.rifsxd.ksunext.R
 import com.rifsxd.ksunext.ui.component.KeyEventBlocker
+import com.rifsxd.ksunext.ui.util.FlashResult
 import com.rifsxd.ksunext.ui.util.LkmSelection
 import com.rifsxd.ksunext.ui.util.LocalSnackbarHost
 import com.rifsxd.ksunext.ui.util.flashModule
@@ -80,38 +81,17 @@ enum class FlashingStatus {
 // Lets you flash modules sequentially when mutiple zipUris are selected
 fun flashModulesSequentially(
     uris: List<Uri>,
-    onFinish: (Boolean, Int) -> Unit,
     onStdout: (String) -> Unit,
     onStderr: (String) -> Unit
-) {
-    val iterator = uris.iterator()
-
-    // Start processing from the first module inside a coroutine
-    CoroutineScope(Dispatchers.IO).launch {
-        // Define the recursive function within the coroutine
-        suspend fun processNext() {
-            if (iterator.hasNext()) {
-                // Flash the current module
-                flashModule(iterator.next(), onFinish = { showReboot, code ->
-                    // If successful, continue to the next one
-                    if (code == 0) {
-                        // Recursively call to process the next module
-                        launch {
-                            processNext()
-                        }
-                    } else {
-                        onFinish(showReboot, code)  // If failed, finish the process
-                    }
-                }, onStdout, onStderr)
-            } else {
-                // No more modules to process, finish the process
-                onFinish(true, 0)
+): FlashResult {
+    for (uri in uris) {
+        flashModule(uri, onStdout, onStderr).apply {
+            if (code != 0) {
+                return FlashResult(code, err, showReboot)
             }
         }
-
-        // Start the process
-        processNext()
     }
+    return FlashResult(0, "", true)
 }
 
 /**
@@ -124,7 +104,7 @@ fun flashModulesSequentially(
 fun FlashScreen(navigator: DestinationsNavigator, flashIt: FlashIt) {
 
     var text by rememberSaveable { mutableStateOf("") }
-    var tempText : String
+    var tempText: String
     val logContent = rememberSaveable { StringBuilder() }
     var showFloatAction by rememberSaveable { mutableStateOf(false) }
 
@@ -145,16 +125,7 @@ fun FlashScreen(navigator: DestinationsNavigator, flashIt: FlashIt) {
             return@LaunchedEffect
         }
         withContext(Dispatchers.IO) {
-            flashIt(flashIt, onFinish = { showReboot, code ->
-                if (code != 0) {
-                    text += "Error: exit code = $code.\nPlease save and check the log.\n"
-                }
-                if (showReboot) {
-                    text += "\n\n\n"
-                    showFloatAction = true
-                }
-                flashing = if (code == 0) FlashingStatus.SUCCESS else FlashingStatus.FAILED
-            }, onStdout = {
+            flashIt(flashIt, onStdout = {
                 tempText = "$it\n"
                 if (tempText.startsWith("")) { // clear command
                     text = tempText.substring(6)
@@ -164,7 +135,16 @@ fun FlashScreen(navigator: DestinationsNavigator, flashIt: FlashIt) {
                 logContent.append(it).append("\n")
             }, onStderr = {
                 logContent.append(it).append("\n")
-            })
+            }).apply {
+                if (code != 0) {
+                    text += "Error code: $code.\n $err Please save and check the log.\n"
+                }
+                if (showReboot) {
+                    text += "\n\n\n"
+                    showFloatAction = true
+                }
+                flashing = if (code == 0) FlashingStatus.SUCCESS else FlashingStatus.FAILED
+            }
         }
     }
 
@@ -248,16 +228,15 @@ sealed class FlashIt : Parcelable {
 }
 
 fun flashIt(
-    flashIt: FlashIt, onFinish: (Boolean, Int) -> Unit,
+    flashIt: FlashIt,
     onStdout: (String) -> Unit,
     onStderr: (String) -> Unit
-) {
-    when (flashIt) {
+): FlashResult {
+    return when (flashIt) {
         is FlashIt.FlashBoot -> installBoot(
             flashIt.boot,
             flashIt.lkm,
             flashIt.ota,
-            onFinish,
             onStdout,
             onStderr
         )
diff --git a/manager/app/src/main/java/com/rifsxd/ksunext/ui/util/KsuCli.kt b/manager/app/src/main/java/com/rifsxd/ksunext/ui/util/KsuCli.kt
index cc6dceb7..6070de76 100644
--- a/manager/app/src/main/java/com/rifsxd/ksunext/ui/util/KsuCli.kt
+++ b/manager/app/src/main/java/com/rifsxd/ksunext/ui/util/KsuCli.kt
@@ -49,6 +49,11 @@ fun getKsuDaemonPath(): String {
     }
 }
 
+data class FlashResult(val code: Int, val err: String, val showReboot: Boolean) {
+    constructor(result: Shell.Result, showReboot: Boolean) : this(result.code, result.err.joinToString("\n"), showReboot)
+    constructor(result: Shell.Result) : this(result, result.isSuccess)
+}
+
 object KsuCli {
     val SHELL: Shell = createRootShell()
     val GLOBAL_MNT_SHELL: Shell = createRootShell(true)
@@ -190,10 +195,9 @@ private fun flashWithIO(
 
 fun flashModule(
     uri: Uri,
-    onFinish: (Boolean, Int) -> Unit,
     onStdout: (String) -> Unit,
     onStderr: (String) -> Unit
-): Boolean {
+): FlashResult {
     val resolver = ksuApp.contentResolver
     with(resolver.openInputStream(uri)) {
         val file = File(ksuApp.cacheDir, "module.zip")
@@ -206,9 +210,7 @@ fun flashModule(
 
         file.delete()
 
-        onFinish(result.isSuccess, result.code)
-        return result.isSuccess
-    }
+        return FlashResult(result)
 }
 
 fun runModuleAction(
@@ -236,21 +238,19 @@ fun runModuleAction(
 }
 
 fun restoreBoot(
-    onFinish: (Boolean, Int) -> Unit, onStdout: (String) -> Unit, onStderr: (String) -> Unit
-): Boolean {
+    onStdout: (String) -> Unit, onStderr: (String) -> Unit
+): FlashResult {
     val magiskboot = File(ksuApp.applicationInfo.nativeLibraryDir, "libmagiskboot.so")
     val result = flashWithIO("${getKsuDaemonPath()} boot-restore -f --magiskboot $magiskboot", onStdout, onStderr)
-    onFinish(result.isSuccess, result.code)
-    return result.isSuccess
+    return FlashResult(result)
 }
 
 fun uninstallPermanently(
-    onFinish: (Boolean, Int) -> Unit, onStdout: (String) -> Unit, onStderr: (String) -> Unit
-): Boolean {
+    onStdout: (String) -> Unit, onStderr: (String) -> Unit
+): FlashResult {
     val magiskboot = File(ksuApp.applicationInfo.nativeLibraryDir, "libmagiskboot.so")
     val result = flashWithIO("${getKsuDaemonPath()} uninstall --magiskboot $magiskboot", onStdout, onStderr)
-    onFinish(result.isSuccess, result.code)
-    return result.isSuccess
+    return FlashResult(result)
 }
 
 suspend fun shrinkModules(): Boolean = withContext(Dispatchers.IO) {
@@ -268,10 +268,9 @@ fun installBoot(
     bootUri: Uri?,
     lkm: LkmSelection,
     ota: Boolean,
-    onFinish: (Boolean, Int) -> Unit,
     onStdout: (String) -> Unit,
     onStderr: (String) -> Unit,
-): Boolean {
+): FlashResult {
     val resolver = ksuApp.contentResolver
 
     val bootFile = bootUri?.let { uri ->
@@ -334,8 +333,7 @@ fun installBoot(
     lkmFile?.delete()
 
     // if boot uri is empty, it is direct install, when success, we should show reboot button
-    onFinish(bootUri == null && result.isSuccess, result.code)
-    return result.isSuccess
+    return FlashResult(result, bootUri == null && result.isSuccess)
 }
 
 fun reboot(reason: String = "") {