A smartphone can give travelers a quick first pass when a hotel room, rental, or private space feels wrong. With the lights low, its flashlight may reveal the telltale glint of a camera lens, while the camera itself can sometimes pick up infrared light from night-vision equipment. These simple phone-based checks are useful as a screening tool, but they are not a guarantee that a room is camera-free.
Start by testing whether the phone can see infrared. Point the camera at a television remote and press a button; if a bright white, purple, or bluish flash appears on the screen, that camera sensor can detect at least some infrared light. Turn off the room lights, close the curtains, and slowly scan likely hiding places such as smoke detectors, clocks, vents, shelves, picture frames, and power adapters. Depending on the phone, the front-facing camera may work better than the rear camera because some newer rear cameras filter infrared light. Phone-camera testing and scanning can vary by device.
A second pass uses the phone’s flashlight rather than its camera. Sweep the beam slowly across objects from different angles and watch for a pinpoint reflection that stays unusually bright. A suspicious glimmer is not proof by itself—glass, polished plastic, and other ordinary surfaces can reflect light—but a fixed reflection from an unexpected opening deserves a closer look. Move methodically rather than waving the light randomly, since small lenses can be difficult to distinguish from the surrounding hardware.
Apps that scan a local Wi-Fi network can add another clue by listing connected devices with unfamiliar names or camera-related manufacturers. Their reach is limited, however: the phone must be connected to the same network, and a camera using a separate network, cellular connection, local storage, or no network at all will not appear. Security experts also warn that “detector” apps make broad promises, so installing software only through official app stores or trusted sources is important. Network and infrared tools should be treated as indicators, not definitive proof.
If a device seems genuinely concealed, avoid touching, unplugging, or dismantling it. Photograph its location and surrounding area if doing so is safe, leave the space if necessary, and contact local law enforcement or the relevant property platform. Airbnb’s current policy expressly prohibits hidden security cameras and requires hosts to disclose permitted exterior cameras, making a suspected concealed device a matter for both the platform and authorities. Airbnb’s guest-security guidance says hidden security cameras are prohibited.
The practical takeaway is less cinematic than a perfect spy-gadget solution: use the phone’s infrared test, flashlight, and network scan together, then verify any finding through photographs and proper reporting. No single technique catches every camera, but a calm, systematic inspection can expose obvious equipment and give guests a safer next step when something in the room does not belong.
