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： 64MP Raspberry Pi 3D Display Industrial 4-ch RS485 DC Detection Module Modbus RTU DIN Rail Jetson 1.5inch LCD 10-Axis DOF ROS IMU (A) Sensor UART ARM 32 DSP Processor BLE 5.3 Bluetooth / Accelerometer / Gyroscope / Magnetometer / Temperature & Pressure ESP32-S3 Development Board 1.47 inch LCD 1.47B Display 1.47inch Screen SD 172×320 RGB LED Industrial Modbus RS485 RTU 8-ch Magnetic Latching Relay Module (C) With Digital Input SpotPear Modbus and Audio Speaker RV1106 Adjustable Focus ESP32-S3 Development Board 4 inch LCD TouchScreen Display 480x480 RS485 /SHT20 /Relay For Arduino LVGL 86 TVbox JETSON NANO MINI 2.66inch e-Paper e-link Module 360x184 4-Color Red Yellow Black White For Arduino Raspberry Pi STM32 Jetson Tutorial Information Wiki Program Code User Guide SpotPear Milk-V Duo S User Guide Total ESP32 IR Thermal Imaging Camera SpotPear ESP32-S3 AI Electronic Eye Development Doard DualEye TouchEye 1.28 inch TouchScreen LCD Round Display N16R8 Toy Doll Robot Modbus-Series-BootLoader-Description User Guide

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

TAG： Raspberry Pi 5 PCIe M.2 NVMe SSD Pi5 mini Spotpear VisionFive2 Lite 4GB/8GB RISC V Single Board Computer JH7110S Processor with Integrated 3D GPU WIFI ESP32-S3 4 inch LCD Touchscreen Display 480x480 RS485 SHT20 Relay Arduino LVGL 86 TVbox ESP32 S3 R8 MP3 2.8inch LCD Captive TouchScreen Display LVGL Speaker RTC SD-Card-Port Battery-Port QMI8658-6-Axis-Sensor ESP32-S3 Industrial 8-CH Relay IOT LAN WiFi /Bluetooth /RS485 /RJ45 Ethernet /POE Desktop Trinket Raspberry Pi 4 Model B ReSpeaker Lite Voice Assistant Kit AI For SeeedStudio XIAO ESP32 S3/S3 Sense For Arduino Raspberry Pi Pico 2 RP2350-Matrix Development Board 8×8 RGB LED Matrix QMI8658 6-Axis Sensor desktop tri PI5 ESP32-S3 AI Camera 3.5inch LCD Dual MIC Development Board MINI TV BOX Display 3.5 inch Voice Interruption Object Recognition 10-in-1 Multifunctional RS232 to Ethernet Raspberry Pi 5 PoE HAT G Power over Ethernet 802.3af at 1.91-Inch AMOLED Raspberry Pi 5 DSI Cable Raspberry Pi 5 PCIe to 2-CH PCIe FFC Dual PCIe HAT Board Pi5 Double Raspberry Pi Zero RJ45 HAT Module