Raspberry pi 4 can't find 5ghz wifi

Firstly, you must have a 2.4G/5G dual band routers.

1. Make sure you have set the correct country code using raspi configuration.

sudo raspi-config

select 'Localisation Options' and press 'ENTER'

select 'L4' and press 'ENTER'

select the correct country then press 'ENTER'

2. Use the 'iwlist channel' command to view the currently allowed frequency bands to be connected. These values are different for different countries.

iwlist channel

3. Check the frequency band settings of your router 5G WIFI

For this router, only '149,153,157 or 161' channel can be selected if we want to use 5G WIFI, or can't find 5G wifi in Pi 4 SSID list.

4. Then you can find the 5G wifi on your raspberry pi SSID list

TAG： Serial UART Bus Servo CF35-12 TTL 35KG.CM Magnetic-Encoder High precision and Large torque HDMI to TTL Industrial USB TO 8CH TTL Converter USB to UART Multi Protection Circuits Multi Systems RS485 Bus Raspberry Pi Pico 2 RP2350 Pico2 ARM Cortex-M33 And RISC-V Hazard3 520KByte 4MByte QSPI Flash GC2083 RS232 to Ethernet Argon Neo 5 Raspberry Pi Pico DVI 240x240 1.28inch Round LCD TTL UART To CAN RoArm M2 4 DOF High Torque Serial Bus Servo ROS2 WIFI ESP NOW UART USB ST3235 QMI8658C For ESP32 Raspberry Pi 2-Channel Isolated CAN Bus Expansion HAT Dual Chips Solution Built-In Multi Protections Raspberry Pi Pico ESP32 1.9 inch LCD Capacitive TouchScreen 1.9inch Display ST7789 170x320 for Arduino /Raspberry Pi /Pico Spotpear USB IR Infrared Thermal Imaging Camera C 45°/88° 160x120 For Phone/PC High Temp Warning/Take Photo /Recording video SpotPear RISC-V

Raspberry Pi 4B Storage module NASPi adapter board SATA HDD/SSD hard disk NAS storage server kit

TAG： SpotPear Bus Servo ESP32 UART USB ST RSBL Raspberry PI Robot Seeed Studio XIAO SAMD21 Tiny SuperMini Arduino Raspberry Pi 5 case Raspberry Pi Zero Milk-V RJ45 AURORA AI Laser Radar Dual Eye Camera IMU Integrated Positioning Map Arduino Thermal imaging camera Raspberry Pi Starlight Camera IR-CUT IMX462 1.28inch Round LCD Raspberry Pi MLX90640 Radxa-Zero Thermal imaging camera Raspberry Pi-Zero-2W Raspberry Pi 1.5inch LCD Raspberry Pi 5 PCIe to M.2 SSD OPS Computer LuckFox Core3566 ESP32 Portable Pendant ESP32 C3 MINI TV LVGL Astronaut Clock Watch Buzzer 1.69inch LCD TouchScreen Display ST7789 240x280