diff --git a/hardware/arduino/zunoG2/cores/ZWSupport/ZWSupport.c b/hardware/arduino/zunoG2/cores/ZWSupport/ZWSupport.c
index 3c0a032e..6daa6f66 100644
--- a/hardware/arduino/zunoG2/cores/ZWSupport/ZWSupport.c
+++ b/hardware/arduino/zunoG2/cores/ZWSupport/ZWSupport.c
@@ -54,11 +54,6 @@ static const uint8_t FREQ_TBL_CONV[][2] = { {ZME_FREQ_EU, REGION_EU},
                       						{ZME_FREQ_MY, REGION_KR},
                       						{ZME_FREQ_LR_US, REGION_US_LR}};
 
-bool zuno_IsLr(void) {
-	if (g_zuno_sys->node_id >= 0x100)
-		return (true);
-	return (false);
-}
 
 // -----------------------------------------------------------------
 // STATIC NIF
diff --git a/hardware/arduino/zunoG2/cores/includes/Arduino.h b/hardware/arduino/zunoG2/cores/includes/Arduino.h
index eeae8a63..b08759ff 100644
--- a/hardware/arduino/zunoG2/cores/includes/Arduino.h
+++ b/hardware/arduino/zunoG2/cores/includes/Arduino.h
@@ -33,8 +33,6 @@ enum{
   ZUNO_SECUREPARAM_UNDEFINED = 0xFF,
 };
 
-bool zuno_IsLr(void);
-
 // Configurator 
 #define zunoChangeDefine(type, v)  type v, _##v
 #define zunoChangeInit(v, i) v = i; _##v = v + 1