diff --git a/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt b/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
index ce103b47..1707bdd8 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
@@ -855,7 +855,7 @@ class MainActivity : AppCompatActivity() {
         if (uri != null) {
             when (uri.scheme) {
                 "sip" -> {
-                    val uriStr = uri.toString()
+                    val uriStr = Utils.uriUnescape(uri.toString())
                     var ua = UserAgent.ofDomain(Utils.uriHostPart(uriStr))
                     if (ua == null && BaresipService.uas.size > 0)
                         ua = BaresipService.uas[0]
diff --git a/app/src/main/kotlin/com/tutpro/baresip/Utils.kt b/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
index 4739fedc..303342c1 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
@@ -177,6 +177,13 @@ object Utils {
         return if (checkUriUser(uri)) "$res@${aorDomain(aor)}" else res
     }
 
+    private fun String.replace(vararg pairs: Pair<String, String>): String =
+            pairs.fold(this) { acc, (old, new) -> acc.replace(old, new, ignoreCase = true) }
+
+    fun uriUnescape(uri: String): String {
+        return uri.replace("%2B" to "+", "%3A" to ":", "%3B" to ";", "%40" to "@", "%3D" to "=")
+    }
+
     fun aorDomain(aor: String): String {
         return uriHostPart(aor)
     }