My PC WLAN does not work well with 5G

[cjyn]

I got 5G modem Sagemcom FROM TPG, all my devices work well with it except my SONY PC, this PC's WLAN is " WIFI-E4CD5 intel {R) Centrino(R) Weless-N135. the internet speed only 1-2M.

My PC internet speed was good with the previous NBN,also good with my iPhone hotspot, but it does not work with 5G, very slow.

anyone can help me to fix this issue?

Thx 

[Shane]

Hi @cjyn ,

A possible cause of speed issues is the wireless interference of the Wi-Fi connection of the PC to the modem.
 

Have you tried to connect the PC via LAN for testing purposes? Also, can we check the band steering of the Wi-Fi to see if it is enabled or not? 
 

Regards,