@Rakes 

Good day.

Sorry for the delay.

Did you install this adapter on the windows or Linux system?

If on the windows, please have a look at the following driver:

https://static.tp-link.com/2019/201911/20191128/Archer T4U V3_TP-Link driver_1030.22.0202.2018.zip

and it does not list any 5ghz network, not just the 5ghz of the main router, right?

Thanks a lot.

@Kathy_Z 

I have installed driver both in linux and windows 10 , both case I am not able to find 5Ghz hotspot(created in mobile).

In windows 10 I installed the driver mentioned by you , still it does not list any 5 Ghz network.

But when use the inbuilt wifi in winodws 10 that is able to discover the 5 Ghz network.

Actually I need the driver in linux , let me know if any specific driver you recommend .

Any way to confirm if the hardware is faulty or depenedent on some country code for 5 Ghz.

Regards,

Rakes

@Rakes 

Good day,

Thank you for your kind reply.

Archer T4U only had the driver supported Linux kernel 2.6.18 ~ 4.11:

Archer T4U_V3_181018_Linux_beta

https://static.tp-link.com/2020/202008/20200803/Archer%20T4U_V3_181018_Linux_beta.zip

And is there any 5ghz network that would be detected by the Archer T4U?

By the way, how long have you had the adapter and where are you located?

Thanks a lot.

@Kathy_Z

Thank you for your reply .

We have built the driver but we see most of the channels 5Ghz channels are disabled. As of now we are trying with mobile hotspot(5Ghz).

We can not configure the channels for  mobile hotspot.

We are not able to see any 5Ghz network.

We have bought the adapter recently , we are from India.

We have one query based on what 5Ghz channels are configured in the TpLink USB Wifi dongle ? Is it pre-configured with the dongle or we can configure it ?

We see below is the channel configuration for the TpLink Modem.  And the hotspot we created is broadcasting at 5745Mhz.

We want to know why this channel is disabled ?

Tp Link 5Ghz frequency config.

Frequencies:
                        * 5180 MHz [36] (30.0 dBm)
                        * 5200 MHz [40] (30.0 dBm)
                        * 5220 MHz [44] (30.0 dBm)
                        * 5240 MHz [48] (30.0 dBm)
                        * 5260 MHz [52] (30.0 dBm) (no IR, radar detection)
                        * 5280 MHz [56] (30.0 dBm) (no IR, radar detection)
                        * 5300 MHz [60] (30.0 dBm) (no IR, radar detection)
                        * 5320 MHz [64] (30.0 dBm) (no IR, radar detection)
                        * 5500 MHz [100] (30.0 dBm) (no IR, radar detection)
                        * 5520 MHz [104] (30.0 dBm) (no IR, radar detection)
                        * 5540 MHz [108] (30.0 dBm) (no IR, radar detection)
                        * 5560 MHz [112] (30.0 dBm) (no IR, radar detection)
                        * 5580 MHz [116] (30.0 dBm) (no IR, radar detection)
                        * 5600 MHz [120] (30.0 dBm) (no IR, radar detection)
                        * 5620 MHz [124] (30.0 dBm) (no IR, radar detection)
                        * 5640 MHz [128] (30.0 dBm) (no IR, radar detection)
                        * 5660 MHz [132] (30.0 dBm) (no IR, radar detection)
                        * 5680 MHz [136] (30.0 dBm) (no IR, radar detection)
                        * 5700 MHz [140] (30.0 dBm) (no IR, radar detection)
                        * 5720 MHz [144] (disabled)
                        * 5745 MHz [149] (disabled)
                        * 5765 MHz [153] (disabled)
                        * 5785 MHz [157] (disabled)
                        * 5805 MHz [161] (disabled)
                        * 5825 MHz [165] (disabled)
                        * 5845 MHz [169] (disabled)
                        * 5865 MHz [173] (disabled)
                        * 5885 MHz [177] (disabled)

Regards,

Rakes