diff --git a/app/src/main/kotlin/com/tutpro/baresip/Utils.kt b/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
index b9dc494e..faf03dda 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/Utils.kt
@@ -283,6 +283,8 @@ object Utils {
             BaresipService.linkAddresses = linkAddresses
             Api.uag_reset_transp(true, true)
             Api.net_debug()
+        } else {
+            UserAgent.register()
         }
     }