@Kevin_Z

Thank you for your answer but I already tried this drivers and I still have the same issue

@Kevin_Z 

What is the model number of your home router? Try to change different 5ghz wireless channels, such as 36/40/44/48, change its channel width to 40MHz, then reconnect to the network to confirm.

EDIT 1: I forgot to say that Im using this drivers Archer T3U_beta_U2_U3_5G unstable issue_1030.22.0202.2018 but it seems that now its working after changing the channel to 40 MHz but now I have other problem, on my phone I have  +270 Mbps on T3U only 87

EDIT 2: I still have some problems with 40 MHz. I changed to 20 MHz and seems to be fine now but the internet speed goes down dramatically

When the connection dropped, were you still connected but no internet or the Wi-Fi has been disconnected already?

Wi-Fi disconnected

Moreover, would there be any error message when the connection dropped? Are all other devices still working stably when connected to the router?

No error message.. The other devices keep working

Still have problems in 20MHz..

Kevin_Z wrote

@muscle 

 

May I have the model number of the wireless router? Please also show us the Wi-Fi settings of the 5G on it, you may cover the wireless SSID and password before posting it here.

 Fiber Gateway GR241AG..

Just to confirm, what is the issue when you choose 40MHz for the 5G wireless on the router?

Connection goes down when start download something, the same like 80 MHz

 

The speed may drop if you choose 20MHz, can you confirm again if you can still get +270 Mbps on the phone?

No, only 100Mbps if choose 20MHz

@Kevin_Z 

Kevin_Z wrote

@muscle 

 

Thanks again for the details. We still suggest you update to the latest public driver for this adapter on the system:

https://static.tp-link.com/2020/202006/20200601/00015960-RTLWlanU_WindowsDriver_1030.38.0712.2019_Drv_3.00.0032.L.zip

 

Again, please remove all the other drivers that you have installed on the system, then install this driver manually:

https://www.tp-link.com/support/faq/920/

@Kevin_Z 

I already try that and still have the problem.. I will try again in 40 MHz

Still not work.. Im very disappointed with tplink..