The GoDark® Faraday Bag for Phones in XL is a premium signal-blocking pouch engineered to completely isolate smartphones and similarly sized devices from all wireless communication. By creating a certified Faraday enclosure, it prevents cellular, Wi-Fi, Bluetooth, GPS, and RFID signals from reaching or leaving your device — ensuring no remote tracking, data exfiltration, or unauthorized activation can occur while the device is stored inside.
Trusted by law enforcement, investigators, digital forensics professionals, and privacy-conscious individuals, the XL size accommodates larger smartphones and devices with cases attached. It is an essential tool for evidence preservation, secure transport of seized devices, and personal privacy on the go.
- Blocks all major wireless signals including cellular, GPS, Wi-Fi, Bluetooth, and RFID
- Preserves digital evidence integrity by preventing remote wiping or tampering
- XL sizing accommodates large smartphones, phablets, and cased devices
- Durable, field-ready construction suitable for professional and everyday use
What a Faraday bag actually does
A Faraday enclosure is a conductive shell that attenuates radio energy crossing it in either direction. Seal a phone inside a properly constructed one and the device cannot reach a cell tower, a Wi-Fi access point, a Bluetooth peripheral or a GNSS satellite, and nothing outside can reach the device either. It is not a setting the phone can override, a permission an application can request, or a state a remote administrator can change. It is physics.
That distinction is the entire reason to own one. Airplane mode is a software state: it can be turned off remotely by management software, ignored by a compromised device, and re-enabled by a system update or a scheduled task. A conductive enclosure does not care what the software wants.
The four situations where it matters
Preserving a device as evidence. This is the use that is hardest to substitute. A phone connected to a network can be wiped remotely, have messages deleted by a synced account, or receive new data that alters the state you are trying to preserve. Standard digital-forensics practice is to isolate a seized device from all networks immediately, and a Faraday bag is how that is done in the field between seizure and a forensically sound examination.
Location privacy. A phone reports its position continuously through several independent mechanisms. For an investigator working a surveillance, a protective detail moving a principal, or anyone whose movements are of interest to an opposing party, putting the device in a bag is the only reliable way to stop that reporting.
Sensitive conversations. A phone in the room is a microphone in the room, whether or not anyone intends it to be. Bagging devices before a privileged meeting, a board discussion or a client interview is a small, visible discipline that removes an entire category of risk.
Denying remote access. A device that cannot be reached cannot be unlocked remotely, wiped, triggered, or have its camera or microphone activated by anything outside the bag.
Using one correctly
The seal is the whole product. A roll-top closure needs the specified number of folds and firm pressure along the full width; a partial fold or a loose corner leaves a gap, and radio energy needs only a small one. Take a few seconds to close it properly rather than a hurried single fold.
Test it, and test it periodically rather than once. Seal the phone inside, then call it from another phone. It should go directly to voicemail with no ring. Repeat every few months and after heavy use, because the conductive layer degrades with repeated creasing along the same lines. A bag that has been folded, crammed into a pocket and unfolded a thousand times is not the bag you tested on day one.
Two practical notes. A device that cannot find a network increases transmit power while searching, so battery drains faster inside the bag — expect it and plan for it on a long shield. And a device that has been dark reports its position as soon as it reconnects, so where you open the bag is part of the decision, not an afterthought.
Sizing and daily carry
Check the internal dimensions listed above against your phone in the case you actually use. A bag sized to a bare phone becomes difficult to close properly around a bulky case, and a closure that is hard to make properly is a closure that eventually gets made badly.
If the bag will hold a phone and a key fob together, allow for both. Keyless-entry relay theft is a real and increasingly common attack, and a fob in a Faraday enclosure is immune to it; a bag by the door for keys is one of the simplest security upgrades available to a household.
Care
The enemy is repeated creasing in the same place. Store the bag loosely rather than folded flat under weight, avoid cramming it into a tight pocket where it takes a permanent crease, and keep sharp objects out of it — a puncture in the conductive layer is a hole in the shield whether or not it is visible from outside.
Keep it out of a hot vehicle where you can, inspect the closure surfaces for wear, and retest with the call check on a schedule. These are consumables with a long life, not permanent equipment.
What it does not do
It shields the device only while it is inside and sealed. It does not remove anything already on the phone, it does not undo a compromise, and it does not protect an account that is reachable from anywhere by anyone with the password. If a device is suspected of being compromised rather than merely trackable, shielding it preserves the state — the next step is a forensic examination, not a return to normal use.
For evidence handling, chain of custody and device examination, our digital forensics team handles the part that happens after the bag.
