diff --git a/demo/src/main/kotlin/com/duooomi/ble/demo/DemoScreen.kt b/demo/src/main/kotlin/com/duooomi/ble/demo/DemoScreen.kt
index 5cbb497..e425716 100644
--- a/demo/src/main/kotlin/com/duooomi/ble/demo/DemoScreen.kt
+++ b/demo/src/main/kotlin/com/duooomi/ble/demo/DemoScreen.kt
@@ -84,14 +84,20 @@ fun DemoScreen(
     var otaFetchVersion by remember(sdk) { mutableStateOf("") }
     var otaFetchUserId by remember(sdk) { mutableStateOf("") }
 
-    // bind 完成 → 回填 OTA 入参
-    LaunchedEffect(isActivated, sn) {
-        if (isActivated && sn.isNotEmpty()) {
+    // 进入页面初次填充（对齐 iOS WrapperTestView onAppear）
+    LaunchedEffect(sdk) {
+        if (otaFetchSn.isEmpty()) otaFetchSn = sn
+        if (otaFetchVersion.isEmpty()) otaFetchVersion = version
+        if (otaFetchUserId.isEmpty()) otaFetchUserId = userId
+    }
+    // bind 完成 → 自动回填 sn / currentVersion（对齐 iOS onChange isActivated）
+    LaunchedEffect(isActivated) {
+        if (isActivated) {
             otaFetchSn = sn
-            if (version.isNotEmpty()) otaFetchVersion = version
-            if (otaFetchUserId.isEmpty()) otaFetchUserId = userId
+            otaFetchVersion = version
         }
     }
+    // getVersion 单独触发时也同步过来
     LaunchedEffect(version) {
         if (version.isNotEmpty()) otaFetchVersion = version
     }
@@ -605,7 +611,11 @@ private fun ConfigField(label: String, value: String, onChange: (String) -> Unit
             onValueChange = onChange,
             modifier = Modifier.weight(1f),
             singleLine = true,
-            textStyle = androidx.compose.ui.text.TextStyle(fontSize = 12.sp)
+            textStyle = androidx.compose.ui.text.TextStyle(fontSize = 12.sp),
+            keyboardOptions = androidx.compose.foundation.text.KeyboardOptions(
+                autoCorrect = false,
+                capitalization = androidx.compose.ui.text.input.KeyboardCapitalization.None
+            )
         )
     }
 }
diff --git a/sdk/src/main/kotlin/com/duooomi/ble/DuooomiBleSDK.kt b/sdk/src/main/kotlin/com/duooomi/ble/DuooomiBleSDK.kt
index 14a879c..20be589 100644
--- a/sdk/src/main/kotlin/com/duooomi/ble/DuooomiBleSDK.kt
+++ b/sdk/src/main/kotlin/com/duooomi/ble/DuooomiBleSDK.kt
@@ -100,11 +100,12 @@ class DuooomiBleSDK(context: Context, val config: DuooomiBleConfig) {
                 _deviceInfo.value = null
                 _version.value = ""
                 _isActivated.value = false
-                _sn.value = ""
-                _firmwareUpgrade.value = null
                 _btState.value = ConnectionState.DISCONNECTED
                 protocolService.stopListening()
                 cancelAllPending(DuooomiBleError.NotConnected)
+                // 与 iOS 一致：sn / firmwareUpgrade 不在断开时重置
+                // —— sn 仅在 unbind 成功 / fetchLatestFirmware 软绑失败回滚时清空
+                // —— firmwareUpgrade 仅在 fetchLatestFirmware 成功时覆盖
             }
         }
     }
@@ -198,8 +199,6 @@ class DuooomiBleSDK(context: Context, val config: DuooomiBleConfig) {
         _deviceInfo.value = null
         _version.value = ""
         _isActivated.value = false
-        _sn.value = ""
-        _firmwareUpgrade.value = null
         _btState.value = ConnectionState.DISCONNECTED
         BleLog.i("Disconnected", "Connect")