Need Help Building a Budget-Friendly, Wide-Range RF Detector to Identify Covert Surveillance Devices in Bangladesh

[u/RightSeeker]

Hi everyone,

I run a human rights project in Bangladesh, and I'm looking to build my own RF detector to detect covert surveillance devices, including microphones and cameras that operate over SIM cards (mobile networks), Bluetooth, Wi-Fi, and other common frequencies.

Unfortunately, I couldn't find reliable RF detectors available locally in Bangladesh, and the few that I did find were prohibitively expensive. Importing from abroad is also not an option due to high costs and the bureaucracy involved. So, I’ve decided to build my own RF detector.

I am new to electronics, so I’m seeking guidance on how to get started with this project. My main goal is to build a wide-range RF detector that can detect a broad variety of surveillance devices at a low cost.

My questions are: Can someone link to a beginner-friendly article or guide that explains how to build an RF detector for detecting a variety of bugs, including those transmitting over mobile networks, Bluetooth, Wi-Fi, etc.?

I’m looking for something that’s relatively simple to assemble and cost-effective for a newbie. There are a lot of articles out there, but I’m unsure which one is most appropriate for my needs.

I’d really appreciate any suggestions, resources, or advice you can offer!