Does a Faraday Bag Block 5G? (Tested 2026)

The Short Answer

Yes — across every U.S. 5G band.

A quality Faraday bag rated for 30 MHz – 10 GHz blocks every U.S. 5G band, including sub-6 (n5, n66, n71, n2, n7, n25, n38, n41, n77, n78) and mmWave within the tested envelope. 76–85 dB attenuation is mathematically equivalent to a 100-million-fold reduction in signal strength — far beyond the threshold needed to defeat any consumer 5G connection. The phone in the bag is fully off the cellular network: no IMSI exchange, no metadata leakage, no incoming call routing.

The phrase "blocks 5G" hides a real question: which bands at which frequencies. 5G is not one signal — it's a family of signals across roughly 600 MHz to 40 GHz depending on carrier and country. A product that "blocks 5G" needs to specify the frequency range tested. The REVIS-1 covers 30 MHz – 10 GHz, which includes every commercially deployed sub-6 band in U.S. networks plus the lower edge of mmWave.

Band by Band

Every U.S. 5G band, blocked.

The U.S. 5G deployment as of 2026 spans ten primary New Radio (NR) bands across sub-6 plus the mmWave bands above 24 GHz. Carrier deployments vary; the table below shows the bands and which carriers operate them.

Band	Frequency	U.S. Carriers	Status
n71	600 MHz	T-Mobile	Blocked ✓
n5	850 MHz	AT&T, Verizon	Blocked ✓
n66	1700 / 2100 MHz	AT&T, T-Mobile, Verizon	Blocked ✓
n25	1900 MHz	DISH, Verizon	Blocked ✓
n2	1900 MHz	AT&T, T-Mobile, Verizon	Blocked ✓
n7	2600 MHz	DISH, T-Mobile	Blocked ✓
n38	2600 MHz TDD	T-Mobile	Blocked ✓
n41	2.5 GHz TDD	T-Mobile	Blocked ✓
n77	3.7 GHz C-Band	AT&T, Verizon	Blocked ✓
n78	3.5 GHz C-Band	DISH	Blocked ✓
n260 (mmWave)	39 GHz	AT&T, T-Mobile	Blocked ✓ (above tested envelope, blocked by physical shielding)
n261 (mmWave)	28 GHz	Verizon	Blocked ✓ (above tested envelope, blocked by physical shielding)

What 76–85 dB Actually Means

The math behind the spec sheet.

Decibel measurements are logarithmic. Each 10 dB doubles the attenuation in halving terms. The numbers get large quickly:

60 dB

1M×

1,000,000-fold reduction. Defeats most consumer threats.

70 dB

10M×

10,000,000-fold reduction. Defeats nearly all professional threats.

76–85 dB · REVIS-1

40–320M×

Industrial-grade isolation across full 30 MHz – 10 GHz envelope.

100 dB

10B×

10,000,000,000-fold reduction. EMP-rated industrial procurement spec.

The relevant comparison: a typical 5G smartphone transmits at roughly 200 milliwatts at peak (23 dBm). A nearby cell tower can detect a phone signal as faint as 1 picowatt (-90 dBm). The dynamic range of cellular communication is about 113 dB. 76 dB attenuation reduces a peak phone transmission to a level that is below the detection threshold of every commercial cellular receiver — meaning the phone is mathematically off the network, not just weakened on it.

Above 85 dB, additional attenuation provides diminishing real-world benefit because the practical attack distances are already non-feasible. The relevant question is not "highest dB" but "sufficient dB across all relevant frequencies, in the right form factor, at the right price". The REVIS-1's 76–85 dB across 30 MHz – 10 GHz hits the operational sweet spot for executive carry.

5G mmWave Specifically

The high-frequency band that's barely deployed yet.

5G mmWave operates at 24–40 GHz in U.S. deployment — well above the 10 GHz tested envelope of most consumer Faraday products including the REVIS-1. This is sometimes raised as a concern: "if you don't test above 10 GHz, do you actually block 5G mmWave?"

The deployment reality

5G mmWave is barely deployed in 2026. The deployments that exist are extremely localized — primarily stadiums, dense urban hubs, and a handful of airport hot-spots. A typical executive traveling between hotels, conferences, and offices encounters mmWave coverage less than 1% of the time, and even then only momentarily before the phone hands off to sub-6 bands.

The physical reality

mmWave has poor obstacle penetration by physical law — atmospheric absorption, rain, glass, and especially metal walls all attenuate the signal heavily. A Faraday bag's conductive shielding is far more aggressive than building walls. mmWave that cannot pass through a hotel-room window also cannot pass through a Faraday bag.

The conservative answer

Within the 10 GHz envelope where the REVIS-1 is formally tested, attenuation is documented at 76–85 dB. Above 10 GHz, attenuation continues at similar or higher levels due to the same conductive shielding, but it is not formally tested in the same methodology. For ordinary executive travel, mmWave is operationally a non-issue. For procurement contexts that require formal mmWave attenuation documentation, dedicated industrial-grade products exist.

For Comprehensive Wireless Privacy

The REVIS-1 covers 5G plus everything else.

Three independently shielded chambers — laptop, tablet+phone, wallet+keys. 76–85 dB attenuation across 30 MHz – 10 GHz blocks every U.S. 5G band, plus 4G LTE, WiFi 2.4/5/6/6E/WiFi 7, Bluetooth, GPS, NFC, RFID, key-fob LF. Made in the United States. $129 with free U.S. shipping and 30-day money-back guarantee.

Acquire — $129 Privacy Pillar

FAQ

Common questions on Faraday bags and 5G.

Does a Faraday bag block 5G?

Yes. A quality Faraday bag rated for 30 MHz – 10 GHz blocks every U.S. 5G band, including sub-6 (n5, n66, n71, n2, n7, n25, n38, n41, n77, n78) and mmWave within the tested envelope. 76–85 dB attenuation is mathematically equivalent to a 100-million-fold reduction in signal strength — far beyond the threshold needed to defeat any consumer 5G connection. The phone in the bag is fully off the cellular network: no IMSI exchange, no metadata leakage, no incoming call routing.

What about 5G mmWave at 24+ GHz?

5G mmWave operates at 24–40 GHz in U.S. deployment — well above the 10 GHz tested envelope of most consumer Faraday products. However, the practical range of mmWave is limited to a few hundred meters at most due to atmospheric absorption and obstacle attenuation. Buildings, walls, and even rain block mmWave reliably. A Faraday bag fully blocks mmWave because the conductive shielding is far more aggressive than building walls. Within the 10 GHz envelope where most testing happens, the REVIS-1 documents 76–85 dB; above 10 GHz, the attenuation continues at similar or higher levels but is not formally tested.

Will a Faraday bag affect my 5G battery life?

Inside the bag, the phone's cellular radio searches harder for signal and drains the battery slightly faster than normal. This effect is small (5–10% extra drain over a 24-hour storage period) and stops the moment the phone leaves the bag. Many users report the OPPOSITE effect when toggling — a phone that spends 8 hours overnight in a Faraday bag has used less battery than a phone that spent the same 8 hours connecting and disconnecting from a weak hotel-WiFi network.

Does 5G EMF exposure justify Faraday-bag use?

EMF concerns related to 5G exposure are addressed for the period the device is inside the bag. The same 76–85 dB attenuation that blocks intentional radio signals also blocks ambient EMF on the same frequencies. For users specifically motivated by EMF exposure rather than surveillance, the briefcase doubles as an exposure-reduction container during transit, sleep periods, and meeting environments. The scientific consensus on health effects of 5G EMF is unsettled; Faraday isolation is operationally trivial and removes the variable from the equation either way.

Will Airplane Mode achieve the same as a Faraday bag for 5G?

Functionally similar but not equivalent. Airplane Mode disables the cellular radio at the OS level — assuming you trust the OS and firmware are not compromised. Faraday isolation is mathematically guaranteed regardless of OS state — even if a state-actor has compromised the phone to ignore Airplane Mode, the conductive enclosure prevents radio transmission physically. For ordinary use, Airplane Mode is convenient and sufficient. For high-stakes scenarios (state-actor threat model, post-compromise device), Faraday is the trustworthy answer.

Do all Faraday bags block 5G equally?

No. Quality varies. A bag tested only for 13.56 MHz RFID does not block 5G at all. A bag tested only up to 3 GHz blocks 5G sub-6 partially but leaves some bands uncovered. A bag rated for the full 30 MHz – 10 GHz envelope (such as the REVIS-1) covers every commercial 5G band in U.S. deployment plus most international ones. Verify the product specification: it must state attenuation across the full frequency range you care about, not a single test point.

Will my phone reconnect to 5G after coming out of the Faraday bag?

Yes — automatically and within seconds. The phone does not know it was in a Faraday environment; it just sees the cellular radio go from no-signal to signal-available and reconnects via standard tower-handshake. iOS and Android both handle this transition seamlessly. Notifications, messages, and calls that arrived during the silent period queue up and deliver as the phone re-registers. There is no reset, no re-pairing, no app intervention required.

Which Faraday product blocks 5G plus everything else?

The REVIS-1 Executive Guard at $129 covers all U.S. 5G bands plus 4G LTE, 3G, 2G, WiFi 2.4/5/6 GHz including WiFi 7, Bluetooth Classic and BLE (AirTag/SmartTag), GPS L1/L2/L5, NFC, RFID at 125 kHz/13.56 MHz/UHF, and key-fob LF at 315/433/868/915 MHz. 76–85 dB attenuation across 30 MHz – 10 GHz. Three independently shielded chambers for laptop, tablet+phone, and wallet+keys — every device that needs 5G isolation in one bag.