diff --git a/release/src-rt-6.x.4708/router/others/switch3g b/release/src-rt-6.x.4708/router/others/switch3g
index 9cb917c67f..c13857613d 100755
--- a/release/src-rt-6.x.4708/router/others/switch3g
+++ b/release/src-rt-6.x.4708/router/others/switch3g
@@ -19,13 +19,11 @@ LOGS="logger -t switch3g[$PID]"
 
 
 [ -z "$PREFIX" ] && {
-	echo "usage: switch3g INTERFACE [signal]"
+	echo "usage: $0 INTERFACE [signal]"
 	exit 0
 }
 
-[ ! "$MODE" == "ppp3g" ] && {
-	exit 0
-}
+[ ! "$MODE" == "ppp3g" ] && exit 0
 
 
 switchMode() {
diff --git a/release/src-rt-6.x.4708/router/others/switch4g b/release/src-rt-6.x.4708/router/others/switch4g
index e7a421f742..eaae863dbb 100755
--- a/release/src-rt-6.x.4708/router/others/switch4g
+++ b/release/src-rt-6.x.4708/router/others/switch4g
@@ -23,13 +23,11 @@ LOGS="logger -t switch4g[$PID]"
 
 
 [ -z "$PREFIX" ] && {
-	echo "usage: switch4g INTERFACE [connect|disconnect|signal|reset]"
+	echo "usage: $0 INTERFACE [connect|disconnect|signal|reset]"
 	exit 0
 }
 
-[ ! "$MODE" == "lte" ] && {
-	exit 0
-}
+[ ! "$MODE" == "lte" ] && exit 0
 
 
 NV() {
diff --git a/release/src-rt-6.x.4708/router/others/wwansignal b/release/src-rt-6.x.4708/router/others/wwansignal
index 1b2541dde1..cb439b7c42 100755
--- a/release/src-rt-6.x.4708/router/others/wwansignal
+++ b/release/src-rt-6.x.4708/router/others/wwansignal
@@ -25,13 +25,11 @@ if ! [ -z "$HILINK_IP" ]  && [ "$HILINK_IP" != "0.0.0.0" ]; then
 fi
 
 [ -z "$PREFIX" ] && {
-	echo "usage: wwansignal INTERFACE [-stdout]"
+	echo "usage: $0 INTERFACE [-stdout]"
 	exit 0
 }
 
-[[ "$2" == "-stdout" ]] && {
-	LOGS="echo "
-}
+[[ "$2" == "-stdout" ]] && LOGS="echo "
 
 
 signal3g() {