diff --git a/luci/luci-app-qmodem/root/usr/share/qmodem/modem_dial.sh b/luci/luci-app-qmodem/root/usr/share/qmodem/modem_dial.sh
index b44fba6..b1a097e 100755
--- a/luci/luci-app-qmodem/root/usr/share/qmodem/modem_dial.sh
+++ b/luci/luci-app-qmodem/root/usr/share/qmodem/modem_dial.sh
@@ -270,7 +270,7 @@ check_ip()
                         ;;
                     "mediatek")
                         check_ip_command="AT+CGPADDR=3"
-                        check_ipv6=1
+                        mtk=1
                         stric=1
                         ;;
                 esac
@@ -278,7 +278,7 @@ check_ip()
         esac
         ipaddr=$(at "$at_port" "$check_ip_command" |grep +CGPADDR:)
         if [ -n "$ipaddr" ];then
-            if [ "$check_ipv6" = "1" ] && [ "$pdp_type" = "IPv4v6" ];then
+            if [ $mtk -eq 1 ] && [ "$pdp_type" = "IPv4v6" ];then
                 if ! ping -c 2 -w 5 2400:3200::1 > /dev/null 2>&1; then
                     m_debug "ipv6 is down,try to restart"
                     ifdown "$interface"V6 && sleep 2 && ifup "$interface"V6
@@ -759,6 +759,10 @@ at_dial()
                     cgdcont_command="AT+CGDCONT=1,\"$pdp_type\",\"$apn\""
                     ;;
                 "mediatek")
+                    mtk=1
+                    if [ "$apn" = "auto" ];then
+                        apn="cbnet"
+                    fi
                     at_command="AT+CGACT=1,3"
                     cgdcont_command="AT+CGDCONT=3,\"$pdp_type\",\"$apn\""
                     ;;
@@ -768,8 +772,13 @@ at_dial()
     esac
     m_debug "dialing vendor:$manufacturer;platform:$platform; $cgdcont_command ; $at_command"
     at "${at_port}" "${cgdcont_command}"
-    sleep 3 #修复fm350拨号失败问题 ps:350处理不过来
+    if [ $mtk -eq 1 ];then
+        sleep 3
+    fi
     at "$at_port" "$at_command"
+    if [ $mtk -eq 1 ];then
+        sleep 3
+    fi
 }
 
 ip_change_fm350()