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： Raspberry Pi 5 Industrial USB TO RS485 Isolated Bidirectional Converter Original FT232RNL 2 Meters long Mini TOF Time-of-Flight Laser Ranging Radar Sensor Compatible UART with Arduino Raspberry Pi ESP32 and Pico Raspberry Pi 7 inch HMI industrial DSI Display LCD 7inch TouchScreen Computer 720×1280 Multi Protection Allwinner H618 Power Manager Module Raspberry Pi 5 ESP32 Thermal imaging Computer Secondary Screen Industrial-grade isolated 4-way RS485 hub repeater One RS485 TO Four RS485 Raspberry Pi Pico 2 RP2350 USB A Development Board RP2350A Core3566002000 TVBOX Kit Luckfox Pico Ultra And 4inch LCD RGB Captive TouchScreen Display TOF Time-Of-Flight Laser Range Sensor Radar Module UART / I2C Port RK3566 Raspberry Pi 5 Cooling ESP32 S3 LCD Camera Development Board 2 inch Display QMI8658 Sensor / Battery Port LVGL/HMI For Arduino Milk-V Duo RJ45 SpotPear

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

TAG： Raspberry Pi 10.1 inch QLED Quantum Dot Display 1280x720 Capacitive Touchscreen Computer PC Jetson Game Mini TOF Time-of-Flight Laser Ranging Radar Sensor Compatible with Arduino Raspberry Pi ESP32 and Pico MPS2280P Raspberry Pi 5 PCIe M.2 NVMe SSD Pi5 2280 2242 2230 Raspberry Pi 5 Display Cable FT232RNL USB TO TTL Industrial UART (C) ESP32 T-ETH-Lite Raspber Pi 5 27W Power ESP32 desktop trinket Grove Sensor Kit SeeedStudio-XIAO series Development boards Raspberry Pi 5 DSI Screen ESP32-S3 Round LCD Raspberry Pi HDMI Display Raspberry Pi 5 PCIe to M.2 NVME SSD Multi Function Adapter Board PoE Ethernet Power over RJ45 Ethernet Driver-Free Raspberry Pi Pico 10.1inch DVI LCD LuckFox Pico Camera VGA to RGB CAN Analyzer SpotPear Good low light performance spotpear