diff --git a/app/src/main/kotlin/com/tutpro/baresip/Config.kt b/app/src/main/kotlin/com/tutpro/baresip/Config.kt
index 418ee394..fe0b07ed 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Config.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Config.kt
@@ -286,6 +286,18 @@ object Config {
         // Api.reload_config()
     }
 
+    fun dnsServers(): String {
+        return if (variable("dyn_dns") == "yes")
+            ""
+        else {
+            val servers = variables("dns_server")
+            var serverList = ""
+            for (server in servers)
+                serverList += ", $server"
+            serverList.trimStart(',').trimStart(' ')
+        }
+    }
+
     fun updateDnsServers(dnsServers: List<InetAddress>): Int {
         var servers = ""
         for (dnsServer in dnsServers) {
diff --git a/app/src/main/kotlin/com/tutpro/baresip/SettingsScreen.kt b/app/src/main/kotlin/com/tutpro/baresip/SettingsScreen.kt
index 54e20861..c93eef4f 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/SettingsScreen.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/SettingsScreen.kt
@@ -1368,7 +1368,7 @@ private fun checkOnClick(ctx: Context, viewModel: SettingsViewModel): Boolean {
 
     val transportProtocols = viewModel.transportProtocols.value
         .lowercase(Locale.ROOT).replace(" ", "")
-    if (transportProtocols != viewModel.oldTransportProtocols) {
+    if (transportProtocols != Config.variable("sip_transports")) {
         if (!checkTransportProtocols(transportProtocols)) {
             alertTitle.value = noticeTitle
             alertMessage.value = "${ctx.getString(R.string.invalid_transport_protocols)}: " +
@@ -1385,7 +1385,7 @@ private fun checkOnClick(ctx: Context, viewModel: SettingsViewModel): Boolean {
 
     val dnsServers = addMissingPorts(viewModel.dnsServers.value
         .lowercase(Locale.ROOT).replace(" ", ""))
-    if (dnsServers != viewModel.oldDnsServers) {
+    if (dnsServers != Config.dnsServers()) {
         if (!checkDnsServers(dnsServers)) {
             alertTitle.value = noticeTitle
             alertMessage.value = "${ctx.getString(R.string.invalid_dns_servers)}: $dnsServers"
diff --git a/app/src/main/kotlin/com/tutpro/baresip/SettingsViewModel.kt b/app/src/main/kotlin/com/tutpro/baresip/SettingsViewModel.kt
index 0eb1e290..2f31d436 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/SettingsViewModel.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/SettingsViewModel.kt
@@ -18,13 +18,8 @@ class SettingsViewModel: ViewModel() {
     val autoStart = MutableStateFlow(false)
     val listenAddress = MutableStateFlow("")
     val addressFamily = MutableStateFlow("")
-
     val transportProtocols = MutableStateFlow("")
-    var oldTransportProtocols = ""
-
     val dnsServers = MutableStateFlow("")
-    var oldDnsServers = ""
-
     val tlsCertificateFile = MutableStateFlow(false)
     val verifyServer = MutableStateFlow(false)
     val caFile = MutableStateFlow(false)
@@ -43,18 +38,8 @@ class SettingsViewModel: ViewModel() {
     private var isLoaded = false
 
     fun loadSettings(ctx: Context) {
-        if (isLoaded) return else isLoaded = true
 
-        oldTransportProtocols = Config.variable("sip_transports")
-        oldDnsServers = if (Config.variable("dyn_dns") == "yes")
-            ""
-        else {
-            val servers = Config.variables("dns_server")
-            var serverList = ""
-            for (server in servers)
-                serverList += ", $server"
-            serverList.trimStart(',').trimStart(' ')
-        }
+        if (isLoaded) return else isLoaded = true
 
         autoStart.value = Config.variable("auto_start") == "yes"
 
@@ -65,9 +50,9 @@ class SettingsViewModel: ViewModel() {
             mutableIntStateOf(familyValues.indexOf(Config.variable("net_af").lowercase()))
         addressFamily.value = familyValues[itemPosition.intValue]
 
-        transportProtocols.value = oldTransportProtocols
+        transportProtocols.value = Config.variable("sip_transports")
 
-        dnsServers.value = oldDnsServers
+        dnsServers.value = Config.dnsServers()
 
         tlsCertificateFile.value = File(BaresipService.filesPath + "/cert.pem").exists()