How to Install a Wi-Fi Extender and Improve Coverage

Begin near the router for setup, then place it where the router signal remains usable on the way to the weak area. Avoid cabinets, floors and sources of interference.

Yes. Many models support setup through a phone app or browser configuration. Use instructions for the exact model.

That depends on its setup mode and router compatibility. Some products use a separate network name, and devices may not roam as expected.

It may be too far from the router or obstructed. Move it closer, reconnect, and check its signal indicator before testing coverage again.