EMF protection
Faraday Phone Bag (Large) | Triple-Layer Signal Blocking | Made in the UK
Faraday Phone Bag (Large) | Triple-Layer Signal Blocking | Made in the UK
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Take Control of When Your Phone Communicates
Your phone is constantly transmitting and receiving signals - from mobile networks, Wi-Fi, Bluetooth, GPS and RFID systems - whether you are actively using it or not. For many people, that raises serious questions about privacy, location tracking and the security of sensitive information.
The Leblok Security Faraday Phone Bag acts as a Faraday cage for your phone. When correctly sealed, it physically isolates your device from external wireless signals, blocking communication with mobile networks, Wi-Fi, Bluetooth, GPS and RFID systems entirely - giving you complete control over when your phone communicates with the outside world.
Unlike ordinary phone pouches, a Faraday phone bag creates a physical barrier between your device and external wireless signals. Whether your priority is protecting your privacy, safeguarding sensitive information, reducing unnecessary RF exposure while your phone is not in use, or simply deciding when your device can communicate, the Leblok Security Faraday Phone Bag provides an effective and practical solution.
Built upon Leblok's long-standing expertise in RF shielding, it incorporates three layers of independently tested high-performance RF shielding material. Manufactured in the UK and individually inspected before leaving our factory, it combines proven shielding performance with durable construction that you can rely on.
Product Specifications
External Dimensions (Closed): 165 × 255 mm
Manufactured in: United Kingdom
Construction:
- Triple-layer RF shielding material
- Waterproof outer fabric
- Reinforced stitched construction
- Dual-fold closure
- Secure hook-and-loop fastening
What Can a Faraday Phone Bag Be Used For?
A Faraday phone bag offers a simple way to physically isolate your phone from external wireless signals whenever you choose - whether you're travelling, attending confidential meetings, storing your phone while not in use, or simply prefer greater control over when it communicates.
The Leblok Security Faraday Phone Bag can help you:
- Block communication with mobile networks (2G, 3G, 4G and 5G).
- Prevent Wi-Fi, Bluetooth and GPS signals from reaching your device.
- Help protect sensitive information stored on your phone.
- Prevent location tracking while your phone is inside the bag.
- Help reduce unnecessary RF exposure by preventing your phone from communicating with external wireless networks while it is not in use.
- Keep your phone available for emergencies while ensuring it remains isolated until required.
- Shield compatible RFID-enabled devices from unwanted communication.
- Provide an additional layer of protection against electromagnetic pulse (EMP) events.
Simply place your phone inside the bag, fold the opening twice and fasten the security strap. Your phone remains physically isolated until you choose to remove it.
Why Choose Leblok Security?
Shielding is at the core of what Leblok does.
Long before introducing the Leblok Security range, Leblok established itself as a specialist manufacturer of EMF shielding clothing and protective products trusted by customers around the world. The same understanding of RF shielding materials, construction techniques and quality control has been carried directly into every Faraday phone bag we make.
Rather than relying on a single shielding layer, the Leblok Security Faraday Phone Bag incorporates three layers of independently tested high-performance RF shielding material, carefully bonded together and reinforced with durable stitching to provide reliable shielding performance and long-term durability.
Every Leblok Security Faraday Phone Bag is manufactured in the UK and individually inspected before leaving our factory, because dependable signal isolation relies not only on the shielding material but also on the quality of the finished construction.
Why Three Layers Matter
Not all Faraday bags are constructed in the same way.
Many signal blocking phone pouches rely on a single layer of shielding material. The Leblok Security Faraday Phone Bag uses three independently tested layers of high-performance RF shielding fabric, creating multiple shielding barriers within the bag's construction.
Combined with the dual-fold closure, this multi-layer Faraday cage design helps provide dependable signal isolation while maintaining excellent durability for everyday use. The result is a Faraday phone bag that has been built not only to perform, but also to withstand regular daily use.
Large Model - Extra Space When You Need It
The Large model has been developed to accommodate virtually all modern smartphones, including larger flagship models.
Its spacious design also provides room for additional items such as:
- Charging cable
- Passport
- Multiple mobile phones
- Car key fobs
- GPS devices
- Other small electronic devices
Looking for a more compact option? See our Leblok Security Faraday Phone Bag (Medium), sized for everyday carry.
Built for Everyday Reliability
The effectiveness of a Faraday cage phone bag depends on much more than simply using conductive fabric. Every Leblok Security Faraday Phone Bag combines carefully selected materials with precise manufacturing techniques to produce reliable, long-lasting shielding performance.
Features include:
- Triple-layer RF shielding construction
- Waterproof outer fabric
- High-strength bonded construction
- Reinforced stitching throughout
- Secure hook-and-loop fastening
- Dual-fold closure designed to minimise signal leakage
- Durable construction for repeated daily use
Every detail has been developed to deliver dependable performance while maintaining ease of use.
Independently Tested Shielding Material
Confidence in shielding performance should be based on independent testing rather than assumptions.
The RF shielding material used in the Leblok Security Faraday Phone Bag has been independently tested by the University of the Armed Forces (RF, Microwaves and RADAR Department), Germany, in accordance with internationally recognised standards ASTM D-4935-10 and IEEE 299-2006.
The test results below represent the shielding performance of one layer of the material. The product is constructed with three layers of this shielding material.
| Frequency | Shielding | Standard |
|---|---|---|
| RFID 13.56 MHz | 80 dB | ASTM D-4935-10 |
| C-Net, TETRA, 450 MHz | 80 dB | ASTM D-4935-10 |
| D-Net, GSM900, 900 MHz | 83 dB | ASTM D-4935-10 |
| E-Net, GSM1800, 1800 MHz | 85 dB | ASTM D-4935-10 |
| Bluetooth, WLAN 2450 MHz | 84 dB | ASTM D-4935-10 |
| 5G (Sub 6GHz Band) 3.4–3.8 GHz | 85 dB | ASTM D-4935-10 |
| W-LAN New Generation 5.8 GHz | 75 dB | ASTM D-4935-10 |
| 7.5 GHz | >42 dB | IEEE 299-2006 |
| 10.0 GHz | >42 dB | IEEE 299-2006 |
| 12.5 GHz | >42 dB | IEEE 299-2006 |
| 15.0 GHz | >42 dB | IEEE 299-2006 |
| 18.0 GHz | >42 dB | IEEE 299-2006 |
| 30 GHz | >52 dB | IEEE 299-2006 |
| 35 GHz | >52 dB | IEEE 299-2006 |
| 40 GHz | >52 dB | IEEE 299-2006 |
Protection Against Common Wireless Technologies
When correctly sealed, the Leblok Security Faraday Phone Bag helps isolate compatible devices from a wide range of wireless technologies, including:
- Mobile phone networks (2G, 3G, 4G, 5G)
- Wi-Fi
- Bluetooth
- GPS
- RFID
- Zigbee
- TETRA communications
It is also intended to help protect compatible devices against TEMPEST surveillance methods and electromagnetic pulse (EMP) events, as described in the product's technical documentation.
Simple to Use
- Place your mobile phone or compatible electronic device inside the bag.
- Fold the opening over twice.
- Secure the fastening strap firmly.
Your device is now physically isolated from external wireless communication until removed.
Who Is the Faraday Phone Bag Ideal For?
The Leblok Security Faraday Phone Bag is ideal for people who:
- Value digital privacy and want greater control over when their phone communicates.
- Need to prevent location tracking or block phone signals in specific situations.
- Want to safeguard sensitive information stored on their device.
- Prefer reducing unnecessary RF exposure while their phone is not in use.
- Need dependable signal isolation while travelling or in confidential meetings.
- Carry larger smartphones or multiple small electronic devices.
- Appreciate products manufactured to high quality standards for long-term use.
Frequently Asked Questions
Yes. When correctly sealed, the Leblok Security Faraday Phone Bag physically isolates your phone from external wireless signals, blocking communication with mobile networks, Wi-Fi, Bluetooth, GPS and RFID systems.
The bag works on the same principle as a Faraday cage - the RF shielding material creates a conductive enclosure that prevents external radio signals from reaching the device inside. The shielding material used in this bag has been independently tested, and detailed results are provided on this page.
No. Your phone can remain switched on inside the Faraday Phone Bag.
When the bag is correctly sealed, it physically isolates your phone from external wireless signals, preventing normal communication with mobile networks, Wi-Fi, Bluetooth, GPS and RFID systems. Some customers prefer to switch their phone off before placing it inside the bag, while others leave it switched on. The Faraday Phone Bag performs the same function either way, provided it is correctly sealed.
No. When the Leblok Security Faraday Phone Bag is correctly sealed, your phone is isolated from external wireless signals. Calls, messages and notifications will not be received while the phone remains inside the bag.
Once the phone is removed, it will reconnect to the available network, allowing new calls, messages and notifications to be received. Depending on your mobile network and phone settings, missed calls may appear as missed calls or voicemail notifications.
The best Faraday bag for a phone is one that combines independently tested shielding material with reliable construction - because a signal blocking pouch is only as effective as its weakest point, whether that's the closure, the stitching or the shielding fabric itself.
The Leblok Security Faraday Phone Bag uses three layers of RF shielding material independently tested by the University of the Armed Forces (Germany), and is manufactured in the UK with reinforced construction and a dual-fold closure specifically designed to minimise signal leakage. Every bag is individually inspected before leaving the factory.
Yes. When correctly sealed, the Leblok Security Faraday Phone Bag helps isolate compatible devices from 5G signals (Sub-6 GHz band), as well as 2G, 3G, 4G, Wi-Fi, Bluetooth, GPS, RFID, Zigbee and TETRA communications.
Independent laboratory test results for the shielding material across all tested frequencies are provided in the table on this page.
As soon as your phone is removed from the bag, it begins reconnecting to available wireless networks. Within a few moments, depending on network availability, your phone will normally reconnect to your mobile network, Wi-Fi, Bluetooth devices and other wireless services that were previously enabled.
The Large model is intended to accommodate virtually all modern smartphones, including larger flagship models. External dimensions (closed) are 165 × 255 mm.
It also provides additional room for items such as a charging cable, passport or other small electronic devices, provided the bag can be correctly folded and sealed. If the bag cannot be correctly sealed, effective signal isolation cannot be expected.
Although primarily intended for mobile phones, the Large Faraday Phone Bag can also be used to store compatible electronic devices and personal items that fit comfortably inside while allowing the bag to be correctly sealed.
Typical examples include a mobile phone and charging cable, a passport, multiple mobile phones, car key fobs, GPS devices and other small electronic devices.
If your primary purpose is protecting a car key against wireless relay attacks, see our Key Fob Faraday Bag.
When correctly sealed, the Leblok Security Faraday Phone Bag blocks the wireless signals that enable location tracking, including GPS, mobile network triangulation and Wi-Fi positioning. While your phone remains inside the correctly sealed bag, it cannot transmit or receive the signals used to determine its location.
Once the phone is removed from the bag, normal connectivity resumes and location services will function again as usual.
