--- b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
+++ a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
@@ -260,6 +260,7 @@
 		pinctrl-names = "default";
 		pinctrl-0 = <&vcc_4g_5v_en>;
 		regulator-name = "vcc_4g_5v";
+		regulator-always-on;
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
 		vin-supply = <&vcc5v0_sys>;
@@ -272,6 +273,7 @@
 		pinctrl-names = "default";
 		pinctrl-0 = <&vcc_4g_en>;
 		regulator-name = "vcc_4g";
+		regulator-always-on;
 		regulator-min-microvolt = <3800000>;
 		regulator-max-microvolt = <3800000>;
 		vin-supply = <&vcc_sysin>;
@@ -959,35 +961,6 @@
 	};
 };
 
-&uart3 {
-	status = "okay";
-
-	modem {
-		compatible = "quectel,eg25";
-		char-device-name = "modem-power";
-
-		pinctrl-names = "default";
-		pinctrl-0 = <&modem_control_pins>;
-
-		power-supply = <&vcc_4g>;
-		vbus-supply = <&vcc_4g_5v>;
-
-		enable-gpios = <&gpio0 RK_PB0 GPIO_ACTIVE_HIGH>; // W_DISABLE#
-		reset-gpios = <&gpio3 RK_PB0 GPIO_ACTIVE_HIGH>;
-		status-gpios = <&gpio3 RK_PA6 GPIO_ACTIVE_HIGH>;
-		pwrkey-gpios = <&gpio0 RK_PB5 GPIO_ACTIVE_HIGH>;
-
-		host-ready-gpios = <&gpio0 RK_PB4 GPIO_ACTIVE_HIGH>; // apready
-		wakeup-gpios = <&gpio0 RK_PA1 GPIO_ACTIVE_HIGH>; // ri
-
-		dtr-gpios = <&gpio0 RK_PA3 GPIO_ACTIVE_HIGH>;
-		cts-gpios = <&gpio3 RK_PC0 GPIO_ACTIVE_HIGH>;
-		rts-gpios = <&gpio3 RK_PC1 GPIO_ACTIVE_HIGH>;
-
-		quectel,qdai = "3,0,0,4,0,0,1,1";
-	};
-};
-
 &pmu_io_domains {
 	pmu1830-supply = <&vcc_1v8>;
 	status = "okay";