diff --git a/app/src/main/kotlin/com/tutpro/baresip/Account.kt b/app/src/main/kotlin/com/tutpro/baresip/Account.kt
index 6e7fc6c9..5cf1c25a 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Account.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Account.kt
@@ -31,6 +31,7 @@ class Account(val accp: Long, virtualAor: String? = null) {
     var answerMode = if (accp != 0L) Api.account_answermode(accp) else Api.ANSWERMODE_MANUAL
     var autoRedirect = if (accp != 0L) Api.account_sip_autoredirect(accp) else false
     var blockUnknown = false
+    var blockHidden = false
     var vmUri = if (accp != 0L) Api.account_vm_uri(accp) else ""
     var vmNew = 0
     var vmOld = 0
@@ -79,6 +80,7 @@ class Account(val accp: Long, virtualAor: String? = null) {
             configuredRegInt = Utils.paramValue(extra, "regint").toInt()
         callHistory = Utils.paramValue(extra, "call_history") == ""
         blockUnknown = Utils.paramExists(extra, "block_unknown")
+        blockHidden = Utils.paramExists(extra, "block_hidden")
         if (Utils.paramExists(extra, "country_code"))
             countryCode = Utils.paramValue(extra, "country_code")
         if (Utils.paramExists(extra, "tel_provider"))
@@ -182,6 +184,9 @@ class Account(val accp: Long, virtualAor: String? = null) {
         if (blockUnknown)
             extra += ";block_unknown=yes"
 
+        if (blockHidden)
+            extra += ";block_hidden=yes"
+
         if (telProvider != "")
             extra += ";tel_provider=${URLEncoder.encode(telProvider, "UTF-8")}"
 
diff --git a/app/src/main/kotlin/com/tutpro/baresip/AccountScreen.kt b/app/src/main/kotlin/com/tutpro/baresip/AccountScreen.kt
index 56fb7d97..30b5bca3 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/AccountScreen.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/AccountScreen.kt
@@ -646,6 +646,33 @@ private fun AccountContent(
         }
     }
 
+    @Composable
+    fun BlockHidden() {
+        val blockHiddenTitle = stringResource(R.string.block_hidden)
+        val blockHiddenHelp = stringResource(R.string.block_hidden_help)
+        val block by viewModel.blockHidden.collectAsState()
+        Row(
+            Modifier.fillMaxWidth().padding(end = 10.dp),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.Start
+        ) {
+            Text(text = blockHiddenTitle,
+                modifier = Modifier
+                    .weight(1f)
+                    .clickable {
+                        alertTitle.value = blockHiddenTitle
+                        alertMessage.value = blockHiddenHelp
+                        showAlert.value = true
+                    },
+                fontSize = 18.sp
+            )
+            Switch(
+                checked = block,
+                onCheckedChange = { viewModel.blockHidden.value = it }
+            )
+        }
+    }
+
     @Composable
     fun AudioCodecs(navController: NavController, aor: String) {
         Row(
@@ -1333,6 +1360,7 @@ private fun AccountContent(
             }
         }
         BlockUnknown()
+        BlockHidden()
         if (!ua.account.isMobile) {
             AudioCodecs(navController, aor)
             MediaEnc()
@@ -1673,6 +1701,12 @@ private fun checkOnClick(ctx: Context, viewModel: AccountViewModel, ua: UserAgen
         Log.d(TAG, "New blockUnknown is ${acc.blockUnknown}")
     }
 
+    val newBlockHidden = viewModel.blockHidden.value
+    if (newBlockHidden != acc.blockHidden) {
+        acc.blockHidden = newBlockHidden
+        Log.d(TAG, "New blockHidden is ${acc.blockHidden}")
+    }
+
     var newVmUri = viewModel.vmUri.value.trim()
     if (newVmUri != acc.vmUri) {
         if (newVmUri != "") {
diff --git a/app/src/main/kotlin/com/tutpro/baresip/AccountViewModel.kt b/app/src/main/kotlin/com/tutpro/baresip/AccountViewModel.kt
index 6e94132e..f2732130 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/AccountViewModel.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/AccountViewModel.kt
@@ -25,6 +25,7 @@ class AccountViewModel: ViewModel() {
     val answerMode = MutableStateFlow(0)
     val autoRedirect = MutableStateFlow(false)
     val blockUnknown = MutableStateFlow(false)
+    val blockHidden = MutableStateFlow(false)
     val vmUri = MutableStateFlow("")
     val countryCode = MutableStateFlow("")
     val telProvider = MutableStateFlow("")
@@ -60,6 +61,7 @@ class AccountViewModel: ViewModel() {
         answerMode.value = acc.answerMode
         autoRedirect.value = acc.autoRedirect
         blockUnknown.value = acc.blockUnknown
+        blockHidden.value = acc.blockHidden
         vmUri.value = acc.vmUri
         countryCode.value = acc.countryCode
         telProvider.value = acc.telProvider
diff --git a/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt b/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
index 8b84177c..4544e2e1 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt
@@ -960,6 +960,8 @@ class BaresipService: Service() {
 			                    getString(R.string.call_blocked),
                                 Utils.friendlyUri(this, peerUri, ua.account)
                             )
+                        else if (ua.account.blockHidden && peerUri.contains("anonymous"))
+                            getString(R.string.hidden_call_blocked)
                         else if (!Utils.checkPermissions(this, arrayOf(RECORD_AUDIO)))
                             getString(R.string.no_calls)
                         else
@@ -969,7 +971,8 @@ class BaresipService: Service() {
                             Api.sip_treply(callp, 486, "Busy Here")
                             Api.bevent_stop(ev[2].toLong())
                             toast(toastMsg)
-                            if (toastMsg.contains(getString(R.string.call_blocked))) {
+                            if (toastMsg.contains(getString(R.string.call_blocked)) ||
+                                toastMsg.contains(getString(R.string.hidden_call_blocked))) {
                                 if (ua.account.callHistory)
                                     Blocked(
                                         ua.account.aor,
@@ -1372,7 +1375,10 @@ class BaresipService: Service() {
             return
         }
 
-        if (ua.account.blockUnknown && Contact.contactName(peerUri) == peerUri) {
+        val blockedHidden = ua.account.blockHidden && peerUri.contains("anonymous")
+        val blockedUnknown = ua.account.blockUnknown && Contact.contactName(peerUri) == peerUri
+
+        if (blockedHidden || blockedUnknown) {
             Log.d(TAG, "Auto-rejecting incoming message by $uap from $peerUri")
             Blocked(
                 ua.account.aor,
@@ -1380,13 +1386,14 @@ class BaresipService: Service() {
                 "message",
                 GregorianCalendar().timeInMillis
             ).add()
-            toast(String.format(
+            toast(if (blockedHidden)
+                getString(R.string.hidden_message_blocked)
+            else
+                String.format(
                     getString(R.string.message_blocked),
                     Utils.friendlyUri(this, peerUri, ua.account)
                 )
             )
-            // Api.sip_treply(callp, 486, "Busy Here")
-            // Api.bevent_stop(bevent)
             return
         }
 
@@ -1968,6 +1975,23 @@ class BaresipService: Service() {
 
         if (isIncoming) {
             val e164Uri = e164Uri(uri, ua.account.countryCode)
+            val presentation = telecomCall.details.handlePresentation
+            if (ua.account.blockHidden &&
+                (presentation == TelecomManager.PRESENTATION_RESTRICTED ||
+                        presentation == TelecomManager.PRESENTATION_UNKNOWN)) {
+                Log.d(TAG, "Auto-rejecting incoming PSTN hidden call")
+                telecomCall.disconnect()
+                toast(getString(R.string.hidden_call_blocked))
+                if (ua.account.callHistory) {
+                    Blocked(
+                        ua.account.aor,
+                        uri,
+                        "invite",
+                        GregorianCalendar().timeInMillis
+                    ).add()
+                }
+                return
+            }
             if (ua.account.blockUnknown && Contact.contactName(e164Uri) == e164Uri) {
                 Log.d(TAG, "Auto-rejecting incoming PSTN call from $uri")
                 telecomCall.disconnect()
diff --git a/app/src/main/res/values-fi/strings.xml b/app/src/main/res/values-fi/strings.xml
index 7e8aa600..ec6be322 100644
--- a/app/src/main/res/values-fi/strings.xml
+++ b/app/src/main/res/values-fi/strings.xml
@@ -211,11 +211,13 @@
     <string name="dtmf_info">SIP INFO -pyyntö</string>
     <string name="dtmf_auto">RTP tai SIP INFO</string>
     <string name="answer_mode">Vastaustapa</string>
-    <string name="answer_mode_help">Valitsee tulevien puheluiden vastaustavan.</string>
+    <string name="answer_mode_help">Valitsee tulevien puheluiden vastaustavan</string>
     <string name="manual">Manuaalinen</string>
     <string name="auto">Automaattinen</string>
-    <string name="block_unknown">Estä tuntemattomat</string>
+    <string name="block_unknown">Estä vieraat</string>
     <string name="block_unknown_help">Estä puhelut ja viestit, joiden lähdettä ei löydy yhteystiedoista.</string>
+    <string name="block_hidden">Estä tuntemattomat</string>
+    <string name="block_hidden_help">Estä puhelut ja viestit, joiden lähde on tuntematon.</string>
     <string name="redirect_mode">Uudelleenohjaustapa</string>
     <string name="redirect_mode_help">Valitsee toteutetaanko puhelun uudelleenohjauspyyntö
         automaattisesti vai kysytäänkö vahvistusta.</string>
@@ -273,8 +275,10 @@
     <string name="missed_calls_count">%1$d vastaamatonta puhelua</string>
     <string name="transfer_request_to">Puhelun siirtopyyntö kohteeseen</string>
     <string name="call_auto_rejected">Automaattisesti hylätty puhelu soittajalta \`%1$s\`</string>
-    <string name="call_blocked">Estetty puhelu hylätty soittajalta \`%1$s\`</string>
-    <string name="message_blocked">Estetty viesti hylätty lähettäjältä \`%1$s\`</string>
+    <string name="call_blocked">Estetty puhelu vieraalta soittajalta \`%1$s\`</string>
+    <string name="hidden_call_blocked">Estetty puhelu tuntemattomalta soittajalta</string>
+    <string name="message_blocked">Estetty viesti vieraalta lähettäjältä \`%1$s\`</string>
+    <string name="hidden_message_blocked">Estetty viesti tuntemattomalta lähettäjältä</string>
     <!-- Blocked Activity -->
     <string name="blocked">Estetyt</string>
     <string name="blocked_calls">Estetyt puhelut</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index f81d9d7a..a059bbc9 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -213,8 +213,10 @@
         if confirmation is requested.</string>
     <string name="manual">Manual</string>
     <string name="auto">Automatic</string>
-    <string name="block_unknown">Block Unknown</string>
+    <string name="block_unknown">Block Strangers</string>
     <string name="block_unknown_help">Block calls and messages from peers that are not found in contacts.</string>
+    <string name="block_hidden">Block Hidden</string>
+    <string name="block_hidden_help">Block calls and messages from peers with hidden identification.</string>
     <string name="voicemail_uri">Voicemail URI</string>
     <string name="voicemain_uri_help">SIP URI for checking of voicemail messages. If left empty, voicemail
         messages (Message Waiting Indications) are not subscribed to.
@@ -266,7 +268,9 @@
     <string name="transfer_request_to">Call transfer request to</string>
     <string name="call_auto_rejected">Auto-rejected call from \`%1$s\`</string>
     <string name="call_blocked">Auto-rejected blocked call from \`%1$s\`</string>
+    <string name="hidden_call_blocked">Auto-rejected hidden call</string>
     <string name="message_blocked">Auto-rejected blocked message from \`%1$s\`</string>
+    <string name="hidden_message_blocked">Auto-rejected hidden message</string>
     <!-- Blocked Activity -->
     <string name="blocked">Blocked</string>
     <string name="blocked_calls">Blocked Calls</string>