diff --git a/codec2talkie/build.gradle b/codec2talkie/build.gradle
index 64ed126..ab9d1f9 100644
--- a/codec2talkie/build.gradle
+++ b/codec2talkie/build.gradle
@@ -11,8 +11,8 @@ android {
         applicationId "com.radio.codec2talkie"
         minSdkVersion 23
         targetSdkVersion 30
-        versionCode 170
-        versionName "1.70"
+        versionCode 171
+        versionName "1.71"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
diff --git a/codec2talkie/src/main/res/values/strings.xml b/codec2talkie/src/main/res/values/strings.xml
index a896141..d237d51 100644
--- a/codec2talkie/src/main/res/values/strings.xml
+++ b/codec2talkie/src/main/res/values/strings.xml
@@ -197,10 +197,10 @@
     <string name="tnc_extended_summary">Additional TNC specific settings</string>
     <string name="tnc_extended_uart_title">UART modem prefix</string>
 
-    <string name="custom_prefix_enabled_title">Enable UART prefix</string>
-    <string name="custom_prefix_enabled_summary">Prefix USB data with the HEX string for some LoRA UART modems</string>
-    <string name="custom_prefix_title">USB packet prefix value as a HEX string</string>
-    <string name="custom_prefix_summary">Prefix sent content with a hex string (so called transmission target in UART modems), e.g. C0FFEE</string>
+    <string name="custom_prefix_enabled_title">Enable UART modem TX prefix</string>
+    <string name="custom_prefix_enabled_summary">Prefix data with the HEX string, used in fixed transmission mode by some UART modems to specify transmission target</string>
+    <string name="custom_prefix_title">Packet prefix value as a HEX string</string>
+    <string name="custom_prefix_summary">Prefix content as a HEX string, e.g. C0FFEE</string>
 
     <string name="app_audio_output_speaker_title">Play audio through the speaker</string>
     <string name="app_audio_output_speaker_summary">Output incoming audio through the speaker</string>