diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 1a155a30..7cbbf297 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -81,7 +81,7 @@ dependencies {
     // third-party
     implementation(libs.lazycolumnscrollbar) // for scroll bar
     implementation(libs.reorderable) // for reordering Action items with drag & drop
-//    implementation(libs.libphonenumber) // for checking whether 33123 and +33123 are the same number, 600kb..
+    implementation(libs.libphonenumber) // for checking whether 33123 and +33123 are the same number
 
     // jetbrains kotlinx
     implementation(libs.serialization.json) // for backup/restore json serialization
diff --git a/app/src/main/java/spam/blocker/service/bot/Actions.kt b/app/src/main/java/spam/blocker/service/bot/Actions.kt
index b2c97d0e..fd543a6a 100644
--- a/app/src/main/java/spam/blocker/service/bot/Actions.kt
+++ b/app/src/main/java/spam/blocker/service/bot/Actions.kt
@@ -12,6 +12,8 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.platform.LocalContext
+import com.google.i18n.phonenumbers.PhoneNumberUtil
+import com.google.i18n.phonenumbers.Phonenumber
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.DelicateCoroutinesApi
@@ -1647,30 +1649,29 @@ class ParseIncomingNumber(
                 return false
             }
 
-            // Use libphonenumber to check if the number has no leading + but is actually started with the CC.
-            // e.g.:   3312345, it's actually +3312345 but no leading +
-            // I'm trying to avoid using this library, because it increases the apk by 600kb.
-            // Here, the code assumes all international calls to start with leading +.
-            // If anyone has received number like 3312345, please report on github.
-
             // Not sure if it's possible to have a number start with CC but has no leading `+`,
             //  for instance: 33xxxxxxxx
             // Check the part xxxxxxxx, if it's still a valid number for cc==33,
             //   then the xxxxxxxx is the domestic part.
             // Otherwise, the entire 33xxxxxxxx is a domestic number
-//            val rest = clearedNumber.substring(cc.toString().length)
-//            val pnUtil = PhoneNumberUtil.getInstance()
-//            val n = Phonenumber.PhoneNumber().apply {
-//                countryCode = cc
-//                nationalNumber = rest.toLong()
-//            }
-//            if (pnUtil.isValidNumber(n)) { // the number start with CC
-//                aCtx.cc = cc.toString()
-//                aCtx.domestic = rest
-//            } else { // it's simply a domestic number
+            if (clearedNumber.startsWith(cc.toString())) {
+                val rest = clearedNumber.substring(cc.toString().length)
+                val pnUtil = PhoneNumberUtil.getInstance()
+                val n = Phonenumber.PhoneNumber().apply {
+                    countryCode = cc
+                    nationalNumber = rest.toLong()
+                }
+                if (pnUtil.isValidNumber(n)) { // the number start with CC
+                    aCtx.cc = cc.toString()
+                    aCtx.domestic = rest
+                } else { // it's simply a domestic number
+                    aCtx.cc = cc.toString()
+                    aCtx.domestic = clearedNumber
+                }
+            } else { // it's simply a domestic number
                 aCtx.cc = cc.toString()
                 aCtx.domestic = clearedNumber
-//            }
+            }
         }
 
         return true
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index c6b840f0..788551bf 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -5,7 +5,7 @@ junitVersion = "1.2.1"
 kotlin = "2.0.0"
 activityCompose = "1.9.3"
 composeBom = "2024.12.01"
-#libphonenumber = "8.13.52"
+libphonenumber = "8.13.52"
 reorderable = "2.3.3"
 serialization = "1.7.1"
 mockk = "1.13.10"
@@ -17,7 +17,7 @@ junitJupiter = "5.8.2"
 androidx-espresso-core = { module = "androidx.test.espresso:espresso-core", version.ref = "espressoCore" }
 androidx-junit = { module = "androidx.test.ext:junit", version.ref = "junitVersion" }
 androidx-work-runtime-ktx = { module = "androidx.work:work-runtime-ktx", version.ref = "workRuntimeKtx" }
-#libphonenumber = { module = "com.googlecode.libphonenumber:libphonenumber", version.ref = "libphonenumber" }
+libphonenumber = { module = "com.googlecode.libphonenumber:libphonenumber", version.ref = "libphonenumber" }
 mockk = { group = "io.mockk", name = "mockk-android", version.ref = "mockk" }
 reorderable = { module = "sh.calvin.reorderable:reorderable", version.ref = "reorderable" }
 serialization-json = { group = "org.jetbrains.kotlinx", name = "kotlinx-serialization-json", version.ref = "serialization" }