diff --git a/package/base-files/files/lib/preinit/02_sysinfo b/package/base-files/files/lib/preinit/02_sysinfo
index f0ed0ff9f..65b50968e 100644
--- a/package/base-files/files/lib/preinit/02_sysinfo
+++ b/package/base-files/files/lib/preinit/02_sysinfo
@@ -1,11 +1,10 @@
 do_sysinfo_generic() {
-	mkdir -p /tmp/sysinfo
 	[ -d /proc/device-tree ] || return
+	mkdir -p /tmp/sysinfo
 	[ -e /tmp/sysinfo/board_name ] || \
 		echo "$(strings /proc/device-tree/compatible | head -1)" > /tmp/sysinfo/board_name
 	[ ! -e /tmp/sysinfo/model -a -e /proc/device-tree/model ] && \
 		echo "$(cat /proc/device-tree/model)" > /tmp/sysinfo/model
-	[ -z "$(fw_printenv model_name)" ] || fw_printenv model_name > /tmp/sysinfo/model
 }
 
 boot_hook_add preinit_main do_sysinfo_generic
diff --git a/package/boot/uboot-envtools/files/ramips b/package/boot/uboot-envtools/files/ramips
index 51e84fa05..48dd3b573 100644
--- a/package/boot/uboot-envtools/files/ramips
+++ b/package/boot/uboot-envtools/files/ramips
@@ -16,8 +16,7 @@ alfa-network,ac1200rm|\
 alfa-network,awusfree1|\
 alfa-network,quad-e4g|\
 alfa-network,r36m-e4g|\
-alfa-network,tube-e4g|\
-huasifei,mt7621dtu)
+alfa-network,tube-e4g)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x1000" "0x1000"
 	;;
 allnet,all0256n-4m|\
@@ -35,6 +34,7 @@ beeline,smartbox-turbo-plus)
 	;;
 buffalo,wsr-1166dhp|\
 buffalo,wsr-600dhp|\
+huasifei,mt7621dtu|\
 mediatek,linkit-smart-7688|\
 samknows,whitebox-v8|\
 xiaomi,mi-router-4c|\
diff --git a/target/linux/ramips/base-files/sbin/getmac b/target/linux/ramips/base-files/sbin/getmac
new file mode 100755
index 000000000..894a0c444
--- /dev/null
+++ b/target/linux/ramips/base-files/sbin/getmac
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+. /lib/functions.sh
+. /lib/functions/system.sh
+
+if [ -e "/dev/mtd0" ]; then
+	wifi_mac="$(mtd_get_mac_binary factory 0x4)"
+elif [ -e "/dev/mmcblk0" ]; then
+	wifi_mac="$(mmc_get_mac_binary factory 0x4)"
+else
+	echo "Error: unsupported flash."
+	exit 1
+fi
+
+echo "$wifi_mac" | awk '{print toupper($0)}'
diff --git a/target/linux/ramips/base-files/sbin/setmac b/target/linux/ramips/base-files/sbin/setmac
new file mode 100755
index 000000000..9dd20a08d
--- /dev/null
+++ b/target/linux/ramips/base-files/sbin/setmac
@@ -0,0 +1,22 @@
+#!/bin/sh
+
+. /lib/functions/caldata.sh
+
+if [ -e "/dev/mtd0" ]; then
+	part="$(find_mtd_part factory)"
+elif [ -e "/dev/mmcblk0" ]; then
+	part="$(find_mmc_part factory)"
+fi
+[ -n "$part" ] || { echo "Partition 'Factory' not found!"; exit 1; }
+
+mac="$1"
+validate_data macaddr "$mac" >"/dev/null" 2>&1 || { echo "Please specify a correct MAC address!"; exit 1; }
+
+dd if="$part" of="/tmp/Factory.backup" 2>"/dev/null"
+caldata_patch_mac "$mac" "0x4" "" "/tmp/Factory.backup" 2>"/dev/null"
+if [ -e "/dev/mtd0" ]; then
+	mtd -qq write "/tmp/Factory.backup" "factory"
+else
+	dd if="/tmp/Factory.backup" of="$part" bs=512 conv=fsync 2>"/dev/null"
+fi
+rm -rf "/tmp/Factory.backup"
diff --git a/target/linux/ramips/dts/mt7621_huasifei_mt7621dtu.dts b/target/linux/ramips/dts/mt7621_huasifei_mt7621dtu.dts
index b80f43c0d..aeb8cd159 100644
--- a/target/linux/ramips/dts/mt7621_huasifei_mt7621dtu.dts
+++ b/target/linux/ramips/dts/mt7621_huasifei_mt7621dtu.dts
@@ -102,13 +102,11 @@
 			partition@30000 {
 				label = "u-boot-env";
 				reg = <0x30000 0x10000>;
-				read-only;
 			};
 
 			factory: partition@40000 {
 				label = "factory";
 				reg = <0x40000 0x10000>;
-				read-only;
 
 				compatible = "nvmem-cells";
 				#address-cells = <1>;
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index 91ab20284..b734b77c9 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -859,7 +859,7 @@ define Device/huasifei_mt7621dtu
   DEVICE_MODEL := MT7621 DTU
   DEVICE_PACKAGES := kmod-ata-ahci kmod-mt7603 kmod-mt76x2 kmod-sdhci-mt7620 \
 	kmod-usb3 kmod-usb-net-cdc-mbim kmod-usb-net-qmi-wwan \
-	kmod-usb-serial-option luci-proto-qmi sendat
+	kmod-usb-serial-option luci-proto-qmi sendat uboot-envtools
 endef
 TARGET_DEVICES += huasifei_mt7621dtu
 
diff --git a/target/linux/ramips/mt7621/base-files/etc/init.d/set-model-name b/target/linux/ramips/mt7621/base-files/etc/init.d/set-model-name
new file mode 100755
index 000000000..1b8143fab
--- /dev/null
+++ b/target/linux/ramips/mt7621/base-files/etc/init.d/set-model-name
@@ -0,0 +1,11 @@
+#!/bin/sh /etc/rc.common
+
+START=99
+
+start() {
+	[ -n "$(fw_printenv -n model_name 2>/dev/null)" ] && fw_printenv -n model_name > /tmp/sysinfo/model
+}
+
+
+
+