diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 65083b00..7fa316a9 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -8,6 +8,7 @@
         <b>Usage Hints</b>\n\n
         - start by creating an account (click item titles for help)\n
         - usually there is no need to edit the config\n
+        - in config, dns_server by default points to 8.8.8.8:53 for Android 8+ usage\n
         - contacts and history entries can be removed and added to contacts by long clicks\n
         - contacts can be removed by long clicks\n
         - call click when callee has not been given can be used for re-dial\n\n