Here’s how to do this:

Launch your phone’sCameraapp.

Go around the room and point your camera at areas you suspect spy equipment is hidden.

Test it out on a TV remote first to confirm this’ll work.

A screenshot showing IR light from a TV remote with Android’s stock camera app.

Point the remote at your camera and press some of its buttons.

Try both the front-facing and the rear-facing camera.

If you spot any bright-whitish or purple light, set your phone down and investigate further.

Nest cam highlighted (first screenshot) in the Fing Android app

It may be a hidden camera.

Your phone will most likely pick up several wireless devices and networks.

Look for specific brand names, the word cam or camera, or something similar.

A screenshot showing a list of available Wi-Fi networks.

Open theSettingsapp and tapNetwork & internet, orConnectionson some phones.

Walk around the building and watch the list of nearby Wi-Fi networks.

First, turn off all the lights in the room.

Carefully inspect the lightbulb for any faint interior glow.

If you see light on the inside of the bulb, it might contain a camera.

This could be a camera lens.

Most smart glasses have a built-in recording light that should light up when the camera is turned on.