diff --git a/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt b/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
index abaaae44..4975126c 100644
--- a/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
+++ b/app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt
@@ -1123,6 +1123,7 @@ class MainActivity : AppCompatActivity() {
                     dtmfWatcher = call.dtmfWatcher
                     dtmf.addTextChangedListener(dtmfWatcher)
                     infoButton.visibility = View.VISIBLE
+                    infoButton.isEnabled = true
                 }
             }
         }