Qu'est-ce qu'un IMSI Catcher et comment se protéger ?

Fully protecting yourself from an IMSI Catcher is challenging, but these strategies will help minimize risks and keep your privacy intact in 2025:

➔ Although 2G (GSM) is mostly obsolete and disabled in many countries, it’s still active in some places and older devices. In fact, many older model phones still rely on 2G standards, making them especially vulnerable to interception. 2G networks are the most vulnerable, which is why they remain a target for traditional IMSI Catchers.

➔ Modern IMSI Catchers also target 3G and 4G networks, using more complex and less effective techniques, but still dangerous.

➔ Always use genuine 4G or 5G connections and prevent your phone from downgrading to lower networks by configuring it not to connect to 2G (when possible).

➔ Turn on airplane mode when you don’t need connectivity, especially in sensitive locations or high-surveillance areas.

➔ For private communications, use decentralized messaging apps that don’t rely on phone numbers, like SimpleX or Session.

➔ Advanced users can use apps like SnoopSnitch to detect suspicious signals, but they require root access and compatible devices.

➔ Finally, a Faraday bag is the most effective way to physically isolate your phone and block any signal trying to capture it.

Be sure to investigate the options available to you for both affordable and high-quality Faraday bags to ensure maximum protection.

Do you have other precautions or tools you use to protect your privacy? Let us know in the comments, sharing tips helps everyone stay safer. Stay informed about emerging threats and continue to adapt your strategies as technology evolves. There’s no total protection, but these steps make spying much harder and strengthen your privacy.