It depends on which signal jammer you’re referring to, because capabilities vary a lot by model and purpose. In general, signal jammers are designed to disrupt specific wireless frequency bands, not “all signals.”

Here are the most common types of signals that jammers may support:

Common Signal Types Jammed

1. Cellular Signals

Used to block mobile phone communication:

• 2G (GSM, CDMA)
• 3G (UMTS)
• 4G LTE
• 5G (sub‑6 GHz bands on supported models)

Frequencies typically range from 700 MHz to 2600+ MHz

2. GPS / GNSS Signals

Used to block location tracking:

• GPS L1 / L2
• GLONASS
• Galileo
• BeiDou

3. Wi‑Fi Signals

Used to block wireless internet access:

• 2.4 GHz (Wi‑Fi 4 / 802.11b/g/n)
• 5 GHz (Wi‑Fi 5 / 6)
• Some advanced models also target 6 GHz (Wi‑Fi 6E)

4. Bluetooth

• Classic Bluetooth
• Bluetooth Low Energy (BLE)

Often jammed alongside 2.4 GHz Wi‑Fi.

5. Radio Frequency (RF) Remote Signals

Used for:

• Car key fobs
• Garage door openers
• Wireless alarms

Common bands: 315 MHz, 433 MHz, 868 MHz, 915 MHz

6. Drone Control & Telemetry Signals

Anti‑drone jammers may block:

• 2.4 GHz / 5.8 GHz (control & video)
• GPS (navigation)
• Proprietary drone communication links

7. Two‑Way Radios (on specialized models)

• VHF (136–174 MHz)
• UHF (400–520 MHz)

Used by walkie‑talkies and some security radios.