diff --git a/package/boot/uboot-envtools/files/ramips b/package/boot/uboot-envtools/files/ramips
index bce2e5f0fb..4d0e608911 100644
--- a/package/boot/uboot-envtools/files/ramips
+++ b/package/boot/uboot-envtools/files/ramips
@@ -53,6 +53,7 @@ xiaomi,mi-router-ac2100|\
 xiaomi,redmi-router-ac2100)
 	ubootenv_add_uci_config "/dev/mtd1" "0x0" "0x1000" "0x20000"
 	;;
+zyxel,lte3301-plus|\
 zyxel,nr7101)
 	idx="$(find_mtd_index Config)"
 	[ -n "$idx" ] && \
diff --git a/target/linux/ramips/dts/mt7621_zyxel_lte3301-plus.dts b/target/linux/ramips/dts/mt7621_zyxel_lte3301-plus.dts
new file mode 100644
index 0000000000..5ebf13c53b
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_zyxel_lte3301-plus.dts
@@ -0,0 +1,213 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "zyxel,lte3301-plus", "mediatek,mt7621-soc";
+	model = "ZyXEL LTE3301-PLUS";
+
+	aliases {
+		label-mac-device = &gmac0;
+		led-boot = &led_power;
+		led-failsafe = &led_power;
+		led-running = &led_power;
+		led-upgrade = &led_power;
+	};
+
+	gpio_export {
+		compatible = "gpio-export";
+
+		lte_power {
+			gpio-export,name = "lte_power";
+			gpio-export,output = <1>;
+			gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
+		};
+
+		usb_power {
+			gpio-export,name = "usb_power";
+			gpio-export,output = <1>;
+			gpios = <&gpio 7 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power: power {
+			label = "white:power";
+			gpios = <&gpio 5 GPIO_ACTIVE_HIGH>;
+		};
+
+		wifi {
+			label = "white:wifi";
+			gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
+		};
+
+		internet {
+			label = "white:internet";
+			gpios = <&gpio 23 GPIO_ACTIVE_LOW>;
+		};
+
+		usb {
+			label = "white:usb";
+			gpios = <&gpio 24 GPIO_ACTIVE_LOW>;
+			trigger-sources = <&xhci_ehci_port1>, <&ehci_port2>;
+			linux,default-trigger = "usbport";
+		};
+
+		lte {
+			label = "white:lte";
+			gpios = <&gpio 26 GPIO_ACTIVE_LOW>;
+		};
+
+		mobile_green {
+			label = "green:mobile";
+			gpios = <&gpio 31 GPIO_ACTIVE_LOW>;
+		};
+
+		mobile_orange {
+			label = "orange:mobile";
+			gpios = <&gpio 22 GPIO_ACTIVE_LOW>;
+		};
+
+		mobile_red {
+			label = "red:mobile";
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio 6 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+	};
+};
+
+&nand {
+	status = "okay";
+
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partition@0 {
+			label = "Bootloader";
+			reg = <0x0 0x80000>;
+			read-only;
+		};
+
+		partition@80000 {
+			label = "Config";
+			reg = <0x80000 0x80000>;
+		};
+
+		factory: partition@100000 {
+			label = "Factory";
+			reg = <0x100000 0x40000>;
+			read-only;
+		};
+
+		partition@140000 {
+			label = "Kernel";
+			reg = <0x140000 0x1ec0000>;
+		};
+
+		partition@540000 {
+			label = "ubi";
+			reg = <0x540000 0x1ac0000>;
+		};
+
+		partition@2140000 {
+			/* The free space before is from ZyXEL reference implementation. */
+			label = "Kernel2";
+			reg = <0x2140000 0x1ec0000>;
+		};
+
+		partition@4000000 {
+			label = "wwan";
+			reg = <0x4000000 0x100000>;
+		};
+
+		partition@4100000 {
+			label = "data";
+			reg = <0x4100000 0x1000000>;
+		};
+
+		partition@5100000 {
+			label = "rom-d";
+			reg = <0x5100000 0x100000>;
+			read-only;
+		};
+
+		partition@5200000 {
+			label = "reserve";
+			reg = <0x5200000 0x80000>;
+		};
+
+		/* The left over free space is from ZyXEL reference implementation. */
+	};
+};
+
+&pcie {
+	status = "okay";
+
+};
+
+&pcie0 {
+	status = "okay";
+
+	wifi@1,0 {
+		compatible = "pci14c3,7615";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,firmware-eeprom = "mt7615e_eeprom.bin";
+		mediatek,mtd-eeprom = <&factory 0x0000>;
+		mtd-mac-address = <&factory 0xfe6e>;
+		mtd-mac-address-increment = <1>;
+	};
+};
+
+&gmac0 {
+	mtd-mac-address = <&factory 0xfe6e>;
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "lan4";
+		};
+		port@1 {
+			status = "okay";
+			label = "lan3";
+		};
+		port@2 {
+			status = "okay";
+			label = "lan2";
+		};
+		port@3 {
+			status = "okay";
+			label = "lan1";
+		};
+	};
+};
+
+&state_default {
+	gpio {
+		groups = "wdt", "uart3", "rgmii2", "jtag";
+		function = "gpio";
+	};
+};
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index 48448c2ab1..138a3213cb 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -1511,6 +1511,25 @@ define Device/zio_freezio
 endef
 TARGET_DEVICES += zio_freezio
 
+define Device/zyxel_lte3301-plus
+  $(Device/dsa-migration)
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  UBINIZE_OPTS := -E 5
+  DEVICE_VENDOR := ZyXEL
+  DEVICE_MODEL := LTE3301-PLUS
+  DEVICE_PACKAGES := kmod-mt7615e kmod-mt7615-firmware kmod-usb3 \
+	uboot-envtools kmod-usb-ledtrig-usbport kmod-usb-net-qmi-wwan \
+	kmod-usb-serial-option uqmi
+  KERNEL := $(KERNEL_DTB) | uImage lzma | \
+	zytrx-header $$(DEVICE_MODEL) $$(VERSION_DIST)-$$(REVISION)
+  KERNEL_INITRAMFS := $(KERNEL_DTB) | uImage lzma | \
+	zytrx-header $$(DEVICE_MODEL) 9.99(ABQU.1)$$(VERSION_DIST)-recovery
+  KERNEL_INITRAMFS_SUFFIX := -recovery.bin
+  IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
+endef
+TARGET_DEVICES += zyxel_lte3301-plus
+
 define Device/zyxel_nr7101
   $(Device/dsa-migration)
   BLOCKSIZE := 128k
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
index 6743b7e6c3..f83ff797f2 100644
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
@@ -98,6 +98,9 @@ xiaomi,redmi-router-ac2100)
 youhua,wr1200js)
 	ucidef_set_led_netdev "internet" "INTERNET" "green:wan" "wan"
 	;;
+zyxel,lte3301-plus)
+	ucidef_set_led_netdev "internet" "internet" "white:internet" "wwan0"
+	;;
 esac
 
 board_config_flush
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
index cde3cba9bc..aae06ea588 100644
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
@@ -45,7 +45,8 @@ ramips_setup_interfaces()
 		ucidef_set_interface_lan "lan1 lan2"
 		;;
 	linksys,re6500|\
-	netgear,wac104)
+	netgear,wac104|\
+	zyxel,lte3301-plus)
 		ucidef_set_interface_lan "lan1 lan2 lan3 lan4"
 		;;
 	mikrotik,routerboard-750gr3)
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/03_gpio_switches b/target/linux/ramips/mt7621/base-files/etc/board.d/03_gpio_switches
index ed728b07c4..4bf2aa37e0 100644
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/03_gpio_switches
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/03_gpio_switches
@@ -22,6 +22,10 @@ ubnt,edgerouter-x-sfp)
 	ucidef_add_gpio_switch "poe_power_port3" "PoE Power Port3" "403"
 	ucidef_add_gpio_switch "poe_power_port4" "PoE Power Port4" "404"
 	;;
+zyxel,lte3301-plus)
+	ucidef_add_gpio_switch "usb_power" "Power USB Port" "usb_power" "1"
+	ucidef_add_gpio_switch "lte_power" "Power LTE modem" "lte_power" "1"
+	;;
 zyxel,nr7101)
 	ucidef_add_gpio_switch "lte_reset" "Reset LTE/5G modem" "483"
 	;;
diff --git a/target/linux/ramips/mt7621/base-files/etc/init.d/bootcount b/target/linux/ramips/mt7621/base-files/etc/init.d/bootcount
index a155458d3f..03c6d8eea7 100755
--- a/target/linux/ramips/mt7621/base-files/etc/init.d/bootcount
+++ b/target/linux/ramips/mt7621/base-files/etc/init.d/bootcount
@@ -16,6 +16,7 @@ boot() {
 	samknows,whitebox-v8)
 		fw_setenv bootcount 0
 		;;
+	zyxel,lte3301-plus|\
 	zyxel,nr7101)
 		[ $(printf %d $(fw_printenv -n DebugFlag)) -gt 0 ] || fw_setenv DebugFlag 0x1
 		[ $(printf %d $(fw_printenv -n Image1Stable)) -gt 0 ] || fw_setenv Image1Stable 1
diff --git a/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh b/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh
index d30bc3db2e..88a92cf624 100755
--- a/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ramips/mt7621/base-files/lib/upgrade/platform.sh
@@ -82,6 +82,7 @@ platform_do_upgrade() {
 	ubnt,edgerouter-x-sfp)
 		platform_upgrade_ubnt_erx "$1"
 		;;
+	zyxel,lte3301-plus|\
 	zyxel,nr7101)
 		fw_setenv CheckBypass 0
 		fw_setenv Image1Stable 0
