Hello @Mirhbb ,

Welcome to our community.

According to Google Translate, your question is that you failed to use the Tether App to configure the router. If there is any discrepancy, please describe it in English.

1. Check Device Compatibility: Make sure your TP-Link device supports the Tether app. You can view the list of compatible devices here: https://www.tp-link.com/tether/product-list/
Note: For Wi-Fi routers, only Router and Access Point modes are compatible with the Tether app.
2. Network Connection: Ensure your phone is connected to the main Wi-Fi network of your TP-Link device, not to a guest network or any other network.
3. Update Firmware: Log in to your TP-Link device's web management interface and check for any available firmware updates.
4. Disable VPN: Turn off any VPN applications running on your phone, as they may interfere with device detection.
5. Turn Off Mobile Data: Disable mobile/cellular data on your phone while using the Tether app.
6. Reboot Devices: Restart both your TP-Link device and your smartphone.
7. Restart Tether App: Close the Tether app completely (remove it from background apps) and then reopen it.
8. For iOS Users: Go to your phone's Settings > Tether App and enable "Local Network Access" permission.