TP-link is working on this, but there is no definite date when this feature will be supported so far. we may need to wait for some time.

Tplink will add this feature to show how it connect via wireless or wired. Therefore, we may tell how it is working unti that time.

Hey, I just get that it will be improved at the end of July or beginning of Aug. Until that, the guest network will be supported under the ethernet connection.

Here you can refer to this instruction to set it. https://www.tp-link.com/gr/faq-543.html

According to your description, it seems the device is faulty and something wrong with hardware. You can try to update the FW to see whether it works well.

Firstly, make sure the the USB modem is working well on your computer directly. Then, go to tplink official website to check whether it's on the compatibility list. If it's not, try to add APN and...