United States Mobile Phone Signal Blocking Frequencies

Frequency allocations are managed by the Federal Communications Commission (FCC) to ensure efficient use and minimize interference. These frequencies enable mobile operators to provide voice and data services to consumers across the country.
In the United States, cell phone frequencies are allocated into different bands for different generations of mobile communications (2G, 3G, 4G, and 5G).
2G (GSM) frequencies

850 MHz band: 824-849 MHz (uplink), 869-894 MHz (downlink)
1900 MHz band: 1850-1910 MHz (uplink), 1930-1990 MHz (downlink)

3G (UMTS) frequencies

850 MHz band: 824-849 MHz (uplink), 869-894 MHz (downlink)
1900 MHz band: 1850-1910 MHz (uplink), 1930-1990 MHz (downlink)
1700/2100 MHz band: 1710-1755 MHz (uplink), 2110-2155 MHz (downlink)

4G (LTE) frequencies

700 MHz band: 698-748 MHz (uplink), 728-778 MHz (downlink)
1700/2100 MHz band: 1710-1755 MHz (uplink), 2110-2155 MHz (downlink)
1900 MHz band: 1850-1910 MHz (uplink), 1930-1990 MHz (downlink)
2500 MHz band: 2496-2690 MHz (uplink and downlink)

5G frequencies

Low band (sub-1 GHz): primarily uses the 600 MHz and 700 MHz bands
Mid-band (1-6 GHz): includes frequencies such as 2.5 GHz (2500-2690 MHz) and 3.5 GHz (3550-3700 MHz)
High-band (mmWave): Frequencies typically in the 24 GHz, 28 GHz, and 39 GHz bands

Common frequency range

Cellular frequency band: 824-894 MHz
PCS frequency band: 1850-1990 MHz
AWS bands: 1710-1780 MHz and 2110-2180 MHz
CBRS frequency band: 3550-3700 MHz

The universal standard for direct contact in the United States is GSM. If you want to know what standard to use, you need to know some basic principles:

700MHz – for use with other methods and 698-806MHz interoperability. It is intended for future GSM interoperability
GSM800 – Not exactly GSM, but SMR iDEN technology using the common frequencies 806-824MHz and 851-869MHz. Soon it may also be used for CDMA though
GSM850 – The main band in the United States, used with GSM and other 3G bands. Uses the 824-849MHz and 869-894MHz common bands
GSM1900 or PCS – A secondary cellular band in the United States that is identical to GSM, CDMA, and 3G technologies, but has commonalities of 1850–1910MHz and 1930–1990MHz
AWS – for 3G and 4G technologies on the 1710–1755MHz and 2110–2155MHz frequencies
BRS/EBS – used for 4G technology, common frequency is 2496–2690MHz

Although the main frequency band originally used in the United States was 800MHz (AMPS), it has now been replaced by GSM850 as the new main telephone frequency band.
The United States uses 6 highest common standards for modern communication services, mobile communications, and network access. Many modern federal companies use these common spectrum, service providers, and wireless Internet access companies under separate licenses to provide individuals with the assistance they need. AT&T:
AT&T is one of the largest mobile telephone service providers in the United States. They use the following frequencies:

850 MHz (cell band)
1900 MHz (pcs)

Verizon:
Verizon is another important mobile telephone service provider. The frequencies used by Verizon are as follows:

850 MHz (cell band)
1900 MHz (pcs)
700 MHz (low band)
1700/2100 MHz (AWS)

T-Mobile:
T-Mobile is a mobile telephone service provider that uses the following frequencies:

1900 MHz (pcs)
1700/2100 MHz (AWS)
600 MHz (low band)

Sprint:
Sprint is another mobile telephone service provider that uses the following frequencies:

850 MHz (cell band)
1900 MHz (pcs)
2500 MHz (high strip)

US Cellular:
US Cellular is a mobile telephone service provider that uses the following frequencies:

850 MHz (cell band)
1900 MHz (pcs)

Band to cover to block mobile telephony signals:
To effectively block mobile telephony signals, you will need to cover a range of frequencies used by the different operators. The frequencies most commonly used by mobile operators in the United States are as follows:

850 MHz (cell band)
1900 MHz (pcs)
1700/2100 MHz (AWS)
700 MHz (low band)
2500 MHz (high strip)
600 MHz (low band)

Is it legal to use a cell phone signal jammer?

In the United States, using such devices can result in a huge fine of up to $50,000. Therefore, current standards, regulations and requirements strictly restrict such devices. Usually, such devices are used by professional service agencies. Ordinary users cannot use them. In some states, you can bypass the ban.
To effectively block mobile phone signals in the United States, it is necessary to cover several frequencies used by mobile operators such as AT&T, Verizon, T-Mobile, Sprint, and US Cellular. The commonly used frequencies include cell band (850 MHz), PCS (1900 MHz), AWS (1700/2100 MHz), low band (700 MHz and 600 MHz), and high band (2500 MHz).

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