diff --git a/platform/cervantes/koreader-standalone.sh b/platform/cervantes/koreader-standalone.sh
index 21925085b..bca4a862a 100755
--- a/platform/cervantes/koreader-standalone.sh
+++ b/platform/cervantes/koreader-standalone.sh
@@ -33,8 +33,11 @@ if [ -b /dev/mmcblk1p1 ]; then
     mount /dev/mmcblk1p1 /mnt/sd
 fi
 
-# remove wireless module since it wastes battery.
-if lsmod | grep -q 8189fs; then
+# stop connman daemon, KOReader will use wpa_supplicant directly.
+[ -x /etc/init.d/connman ] && /etc/init.d/connman stop
+
+# for Cervantes 4 unload realtek module.
+if [ "$PCB_ID" -eq 68 ] && lsmod | grep -q 8189fs; then
     modprobe -r 8189fs
 fi
 
diff --git a/platform/cervantes/koreader.sh b/platform/cervantes/koreader.sh
index 0ec5a8e12..6308dfe08 100755
--- a/platform/cervantes/koreader.sh
+++ b/platform/cervantes/koreader.sh
@@ -76,6 +76,7 @@ fi
 
 if [ "${STANDALONE}" != "true" ]; then
     stopapp.sh >/dev/null 2>&1
+    [ -x /etc/init.d/connman ] && /etc/init.d/connman stop
 fi
 
 RETURN_VALUE=85
@@ -85,5 +86,6 @@ while [ "${RETURN_VALUE}" -eq 85 ]; do
 done
 
 if [ "${STANDALONE}" != "true" ]; then
+    [ -x /etc/init.d/connman ] && /etc/init.d/connman start
     restart.sh >/dev/null 2>&1
 fi