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 5e1ada1..d8cdd78 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
@@ -234,7 +234,6 @@ check_ip()
                         ;;
                     "mediatek")
                         check_ip_command="AT+CGPADDR=3"
-                        stric=1
                         ;;
                 esac
                 ;;
@@ -293,77 +292,32 @@ check_ip()
 
 check_mtk_connection()
 {
-    local lock_file="${MODEM_RUNDIR}/${modem_config}_dir/mtk_check.lock"
-    local result_file="${MODEM_RUNDIR}/${modem_config}_dir/mtk_check_result"
-
-    if [ -f "$lock_file" ]; then
-        local lock_time=$(stat -c %Y "$lock_file" 2>/dev/null || echo 0)
-        local current_time=$(cat /proc/uptime | awk '{print int($1)}')
-        if [ $((current_time - lock_time)) -lt 5 ]; then
-            return 0
-        else
-            rm -f "$lock_file"
-        fi
-    fi
-
-    touch "$lock_file"
-
-    (
-        if [ "$mtk" -eq 1 ] && [ -n "$ipv4" ] && [ -n "$modem_netcard" ]; then
-            local test=0
-
-            if ping -I "$modem_netcard" -c 1 -w 2 1.1.1.1 > /dev/null 2>&1; then
-                test=1
-            elif ping -I "$modem_netcard" -c 1 -w 2 8.8.8.8 > /dev/null 2>&1; then
-                test=1
-            elif [ -n "$gateway" ] && ping -I "$modem_netcard" -c 1 -w 2 "$gateway" > /dev/null 2>&1; then
-                test=1
+    [ "$connection_status" = "0" ] || [ "$connection_status" = "-1" ] && return 0
+    if [ "$mtk" -eq 1 ] && [ -n "$ipv4" ] && [ -n "$modem_netcard" ]; then
+        for i in 1 2; do
+            if ping -I "$modem_netcard" -w 1 1.1.1.1 >/dev/null 2>&1 || 
+               ping -I "$modem_netcard" -w 2 8.8.8.8 >/dev/null 2>&1; then
+                break
             fi
-
-            if [ "$test" -eq 0 ]; then
+            if [ $i -eq 2 ]; then
                 m_debug "IPv4 connection test failed, will redial"
-                echo "failed" > "$result_file"
-                rm -f "$lock_file"
                 return 1
             fi
-
-            local ifup_time=$(ubus call network.interface.$interface6_name status 2>/dev/null | jsonfilter -e '@.uptime' 2>/dev/null || echo 0)
-            if [ -n "$ifup_time" ] && [ "$ifup_time" -gt 10 ] && { [ "$pdp_type" = "ipv4v6" ] || [ "$pdp_type" = "IPV4V6" ]; } && [ -n "$ipv6" ]; then
-                local ipv6_test=0
-
-                if ping6 -I "$modem_netcard" -c 1 -w 2 2400:3200::1 > /dev/null 2>&1; then
-                    ipv6_test=1
-                elif ping6 -I "$modem_netcard" -c 1 -w 2 2001:4860:4860::8888 > /dev/null 2>&1; then
-                    ipv6_test=1
+            sleep 1
+        done
+        local ifup_time=$(ubus call network.interface.$interface6_name status 2>/dev/null | jsonfilter -e '@.uptime' 2>/dev/null || echo 0)
+        if [ -n "$ifup_time" ] && [ "$ifup_time" -gt 5 ] && [ "$pdp_type" = "ipv4v6" ] && [ -n "$ipv6" ]; then
+            for i in 1 2; do
+                if ping6 -I "$modem_netcard" -w 1 2400:3200::1 >/dev/null 2>&1 || 
+                   ping6 -I "$modem_netcard" -w 2 2001:4860:4860::8888 >/dev/null 2>&1; then
+                    break
                 fi
-
-                if [ "$ipv6_test" -eq 0 ]; then
+                if [ $i -eq 2 ]; then
                     m_debug "IPv6 connection test failed, restarting IPv6 interface"
-                    if [ -n "$interface6_name" ]; then
-                        ifdown "$interface6_name" && sleep 2 && ifup "$interface6_name"
-                        m_debug "Restarted IPv6 interface $interface6_name"
-                    fi
+                    [ -n "$interface6_name" ] && ifdown "$interface6_name" && sleep 2 && ifup "$interface6_name"
                 fi
-            fi
-
-            echo "success" > "$result_file"
-        else
-            echo "skipped" > "$result_file"
-        fi
-
-        rm -f "$lock_file"
-    ) &
-
-    return 0
-}
-
-read_mtk_check_result()
-{
-    local result_file="${MODEM_RUNDIR}/${modem_config}_dir/mtk_check_result"
-    if [ -f "$result_file" ]; then
-        local result=$(cat "$result_file")
-        if [ "$result" = "failed" ]; then
-            return 1
+                sleep 1
+            done
         fi
     fi
     return 0
@@ -675,10 +629,9 @@ ecm_hang()
         at_command='ATI'
     fi
 
-    tmp=$(at "${at_port}" "${at_command}")
+    fastat "${at_port}" "${at_command}"
 }
 
-
 hang()
 {
     m_debug "hang up $modem_path driver $driver"
@@ -853,24 +806,22 @@ at_dial()
     esac
     m_debug "dialing vendor:$manufacturer;platform:$platform; $cgdcont_command ; $at_command"
     at "${at_port}" "${cgdcont_command}"
-    at "$at_port" "$at_command"
+    fastat "$at_port" "$at_command"
+    [ "$mtk" -eq 1 ] && sleep 2
     if [ "$driver" = "mtk_pcie" ];then
-        at "$at_port" "AT+CGACT=0,3"
+        fastat "$at_port" "AT+CGACT=0,3"
         mbim_port=$(echo "$at_port" | sed 's/at/mbim/g')
         umbim -d $mbim_port disconnect
-        umbim -d $mbim_port connect 0
+        sleep 1
+        umbim -d $mbim_port connect
     fi
 }
 
 ip_change_fm350()
 {
     m_debug "ip_change_fm350"
-    local ipv4_config=""
-    local ipv4_dns1=""
-    local ipv4_dns2=""
-    local ipv6_dns1=""
-    local ipv6_dns2=""
-    local gateway=""
+    local public_dns1_ipv4="223.5.5.5"
+    local public_dns2_ipv4="119.29.29.29"
     local netmask="255.255.255.0"
 
     if [ "$driver" = "mtk_pcie" ]; then
@@ -882,43 +833,21 @@ ip_change_fm350()
 
         ipv4_dns1=$(echo "$config" | grep "ipv4dnsserver:" | head -n 1 | awk '{print $2}')
         ipv4_dns2=$(echo "$config" | grep "ipv4dnsserver:" | tail -n 1 | awk '{print $2}')
-        if [ "$ipv4_dns1" = "$ipv4_dns2" ]; then
-            ipv4_dns2="119.29.29.29"
-        fi
-
-        ipv6_dns1=$(echo "$config" | grep "ipv6dnsserver:" | head -n 1 | awk '{print $2}')
-        ipv6_dns2=$(echo "$config" | grep "ipv6dnsserver:" | tail -n 1 | awk '{print $2}')
-
-        m_debug "umbim config: ipv4=$ipv4_config, gateway=$gateway, netmask=$netmask, dns1=$ipv4_dns1, dns2=$ipv4_dns2"
+        [ -z "$ipv4_dns1" ] && ipv4_dns1="$public_dns1_ipv4"
+        [ -z "$ipv4_dns2" ] && ipv4_dns2="$public_dns2_ipv4"
+        # m_debug "umbim config: ipv4=$ipv4_config, gateway=$gateway, netmask=$netmask, dns1=$ipv4_dns1, dns2=$ipv4_dns2"
     else
         at_command="AT+CGPADDR=3"
-        ipv4_config=$(at ${at_port} ${at_command} | cut -d, -f2 | grep -oE '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+')
+        response=$(at ${at_port} ${at_command})
+        ipv4_config=$(echo "$response" | grep "+CGPADDR:" | grep -o '"[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+"' | head -1 | tr -d '"')
         gateway="${ipv4_config%.*}.1"
 
-        local public_dns1_ipv4="223.5.5.5"
-        local public_dns2_ipv4="119.29.29.29"
-        local public_dns1_ipv6="2400:3200::1"
-        local public_dns2_ipv6="2402:4e00::"
-        at_command="AT+GTDNS=3" | grep "+GTDNS: "| grep -E '[0-9]+.[0-9]+.[0-9]+.[0-9]+' | sed -n '1p'
-        local ipv4_dns1=$(echo "${response}" | awk -F'"' '{print $2}' | awk -F',' '{print $1}')
-        [ -z "$ipv4_dns1" ] && {
-            ipv4_dns1="${public_dns1_ipv4}"
-        }
-
-        local ipv4_dns2=$(echo "${response}" | awk -F'"' '{print $4}' | awk -F',' '{print $1}')
-        [ -z "$ipv4_dns2" ] && {
-            ipv4_dns2="${public_dns2_ipv4}"
-        }
-
-        local ipv6_dns1=$(echo "${response}" | awk -F'"' '{print $2}' | awk -F',' '{print $2}')
-        [ -z "$ipv6_dns1" ] && {
-            ipv6_dns1="${public_dns1_ipv6}"
-        }
-
-        local ipv6_dns2=$(echo "${response}" | awk -F'"' '{print $4}' | awk -F',' '{print $2}')
-        [ -z "$ipv6_dns2" ] && {
-            ipv6_dns2="${public_dns2_ipv6}"
-        }
+        response=$(at ${at_port} "AT+GTDNS=3")
+        ipv4_dns=$(echo "$response" | grep "+GTDNS:" | head -1)
+        ipv4_dns1=$(echo "$ipv4_dns" | grep -o '"[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+"' | head -1 | tr -d '"')
+        ipv4_dns2=$(echo "$ipv4_dns" | grep -o '"[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+"' | tail -1 | tr -d '"')
+        [ -z "$ipv4_dns1" ] && ipv4_dns1="$public_dns1_ipv4"
+        [ -z "$ipv4_dns2" ] && ipv4_dns2="$public_dns2_ipv4"
         uci_ipv4=$(uci -q get network.$interface_name.ipaddr)
     fi
     uci set network.${interface_name}.proto='static'
@@ -1042,50 +971,34 @@ check_logfile_line()
 unexpected_response_count=0
 at_dial_monitor()
 {
-    check_ip
     at_dial
     ipv4_cache=$ipv4
-    last_mtk_check=0
+    ipv6_cache=$ipv6
+    sleep 5
     while true; do
         check_ip
-        if [ $connection_status -eq 0 ];then
-            at_dial
-            sleep 3
-        elif [ $connection_status -eq -1 ];then
-            unexpected_response_count=$((unexpected_response_count+1))
-            if [ $unexpected_response_count -gt 3 ];then
+        case $connection_status in
+            0)
                 at_dial
-                unexpected_response_count=0
-            fi
-            sleep 10
-        else
-            check_mtk_if_needed() {
-                if [ "$mtk_check" = "1" ]; then
-                    current_time=$(cat /proc/uptime | awk '{print int($1)}')
-                    if [ "$mtk" -eq 1 ]; then
-                        check_mtk_connection
-                        read_mtk_check_result
-                        if [ $? -eq 1 ]; then
-                            at_dial
-                        fi
-                        last_mtk_check=$current_time
-                    fi
+                sleep 3
+                ;;
+            -1)
+                unexpected_response_count=$((unexpected_response_count+1))
+                if [ $unexpected_response_count -gt 3 ]; then
+                    at_dial
+                    unexpected_response_count=0
                 fi
-            }
-
-            if [ "$ipv4" != "$ipv4_cache" ]; then
-                handle_ip_change
-                ipv6_cache=$ipv6
-                ipv4_cache=$ipv4
-                continue
-            fi
-            sleep 5
-            check_mtk_if_needed
-            sleep 5
-            check_mtk_if_needed
-            sleep 5
-            check_mtk_if_needed
-        fi
+                sleep 5
+                ;;
+            *)
+                if [ "$ipv4" != "$ipv4_cache" ] || [ "$ipv6" != "$ipv6_cache" ]; then
+                    handle_ip_change
+                    ipv4_cache=$ipv4
+                    ipv6_cache=$ipv6
+                fi
+                [ "$mtk_check" -eq 1 ] && { sleep 5; check_mtk_connection || { fastat "$at_port" "AT+CGACT=0,3" && at_dial; }; } || sleep 15
+                ;;
+        esac
         check_logfile_line
     done
 }
diff --git a/luci/luci-app-qmodem/root/usr/share/qmodem/modem_scan.sh b/luci/luci-app-qmodem/root/usr/share/qmodem/modem_scan.sh
index 5d7f3af..f1f0e8f 100755
--- a/luci/luci-app-qmodem/root/usr/share/qmodem/modem_scan.sh
+++ b/luci/luci-app-qmodem/root/usr/share/qmodem/modem_scan.sh
@@ -459,8 +459,9 @@ add()
 set qmodem.$section_name.path="$modem_path"
 set qmodem.$section_name.data_interface="$slot_type"
 set qmodem.$section_name.enable_dial="1"
-set qmodem.$section_name.soft_reboot="0"
-set qmodem.$section_name.pdp_type="ip"
+set qmodem.$section_name.soft_reboot="1"
+set qmodem.$section_name.extend_prefix="1"
+set qmodem.$section_name.pdp_type="ipv4v6"
 set qmodem.$section_name.state="enabled"
 set qmodem.$section_name.metric=$metric
 EOF
diff --git a/luci/luci-app-qmodem/root/usr/share/qmodem/vendor/fibocom.sh b/luci/luci-app-qmodem/root/usr/share/qmodem/vendor/fibocom.sh
index 4bb7418..9bbf282 100755
--- a/luci/luci-app-qmodem/root/usr/share/qmodem/vendor/fibocom.sh
+++ b/luci/luci-app-qmodem/root/usr/share/qmodem/vendor/fibocom.sh
@@ -6,7 +6,9 @@ _Author="Siriling Fujr"
 _Maintainer="Fujr <fjrcn@outlook.com>"
 source /usr/share/qmodem/generic.sh
 
-
+vendor_get_disabled_features(){
+    json_add_string "" ""
+}
 
 debug_subject="fibocom_ctrl"
 #获取拨号模式
@@ -77,7 +79,7 @@ get_mode()
             json_add_string "$available_mode" "0"
         fi
     done
-    json_close_objectget_imei
+    json_close_object
 }
 
 #设置拨号模式
@@ -219,7 +221,7 @@ set_network_prefer_nr()
     esac
 
     #设置模组
-    at_command="AT+GTACT=$network_prefer_num"
+    at_command="AT+GTACT=$network_prefer_num,6,3"
     res=$(at $at_port "$at_command")
     json_select_object "result"
     json_add_string "status" "$res"
@@ -826,8 +828,8 @@ set_lockband_nr()
     m_debug "Fibocom set lockband info"
     get_lockband_config_command="AT+GTACT?"
     get_lockband_config_res=$(at $at_port $get_lockband_config_command)
-    network_prefer_config=$(echo $get_lockband_config_res |cut -d : -f 2| awk -F"," '{ print $1","$2","$3}' |tr -d ' ')
-    local lock_band="$network_prefer_config,$lock_band"
+    network_prefer_config=$(echo $get_lockband_config_res |cut -d : -f 2| awk -F"," '{print $1}' |tr -d ' ')
+    local lock_band="$network_prefer_config,6,3,$lock_band"
     local set_lockband_command="AT+GTACT=$lock_band"
     res=$(at $at_port $set_lockband_command)
 }