1. How far is it to the devices that don't work well?
2. Is the router firmware current?
3. What's different about your WiFi setup?
Example: I still encounter folk that hide the SSID and that can cause odd issues.
4. Some folk don't own their Internet connection. Please folk, don't hide the details. Unless told otherwise I take it you are in the 90+% with an ISP etc.
I have a kindle fire 7, a nintendo switch, a newer android phone, and an old desktop with an inexpensive USB wifi adapter.
I have wifi where I am, but only the phone and kindle receive it well. If I tether the phone to the computer w/ usb or use its hotspot (for the switch or computer - from phone) it works.
Is there something I can get to take the wifi signal and send it out in a compatible way, or a wifi to ethernet receiver that will definitely work?

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