2G GSM, 3G, 4G LTE & 2.4GHz Bluetooth Mobile Phone Detector



With GSM phones getting ever smaller, they are increasingly being used in areas where they are forbidden. This technology is also becoming the preferred medium for bugs and other surveillance devices.

To combat these problems, we have developed the multi-purpose RLV10 mobile phone detector.

  • UMTS 2100 (1920 – 1980 MHz) & UMTS900 (880-915MHz)

Advanced band-selection filtering coupled to our unique signal-detection algorithms and easy-to-use displays gives unprecedented sensitivity and selectivity for this type of equipment.

The RLV10 can detect 2G (GSM900 & GSM1800) 3G (UMTS900 & UMTS 2100) plus 4G (LTE800, LTE1800 and LTE2600) mobile phones. For situations where greater accuracy is required and/or specific monitoring is required in areas containing multiple phones, a specially designed directional antenna system can be used with the RLV10.

The RLV10 keeps a record of all the alarms and complies the total of each type of technology detected. This information can be displayed via its Statistic Display. This allows the user to see at a glance whether there are any trends to using new technology.

In prisons for instance, if the majority of the alarms are GSM, officers will be looking for small GSM devices such as key fob phones. If the 3G totals are high then officers would be looking for much larger phones.

FEATURES of RLV10 mobile phone detector

False Alarm Protection

The RLV10 incorporates several new features to protect against false alarm indications. The first is a special software filter to reject DECT signals. DECT phones work in a frequency band adjacent to the GSM1800 band and cannot be rejected entirely by hardware filters.

The second feature is PMR rejection. The RLV10 will reject a 3G alarm if a special PMR circuit detects energy in the 400-500Mhz band at the same time. This prevents prison radios from causing false alarms due to harmonic transmissions.


The large green OLED display provides the user with details such as Configuration, Alarm information, Display of past Alarms, Statistics etc. The four soft keys allow the user to move easily between the various functions. Display brightness is automatically controlled to match ambient lighting.


The RLV10 is specifically engineered to monitor handset transmit frequencies only and will scan the following simultaneously:

  • EGSM900 (880 – 915MHz) & GSM1800 (1710 – 1785 MHz);
  • UMTS 2100 (1920 – 1980 MHz) & UMTS900 (880-915MHz);
  • LTE800 (824-849 MHz), LTE2600 (2500-2570 MHz) & LTE1800 (1710-1785);
  • Bluetooth@2400MHz;
  • PMR lockout: 400-480MHz bands >-80dBm inhibit 3G detection to avoid false alarms;
  • DECT & TETRA: rejection >-80dBm


Pulse Envelope Demodulation with our unique Digital Signal Processing algorithms helps to prevent false alarms while differentiating between strong, weak, and interfering signals. SAW filters help reject any interference from nearby base-stations.


  • GSM: -75dBm typical (on max setting);
  • UMTS/LTE: -98dBM typical


When in scanning mode the RLV10 display indicates the signal strength and type of phone technology being detected. The current alarm is automatically assigned a record number so details can be recovered at a later time. This feature allows the user to track down the signal source.

All Alarm information is automatically added to the Statistics table which can be recalled when required. This table enables the user to see at a glance which technologies are being used i.e. 2G, 3G or 4G and in what numbers. Although the RLV10 can store over 4000 alarms individual totals in the statistics table cannot exceed 254.


Typically 100 hours, allowing for average use of the vibrator. With vibrator turned off battery life can be extended by many 10’s of hours.

The Low battery LED indicates that the cells should be replaced. If Flat Battery is displayed -replace batteries immediately.


  • Case: (125 x65 x 30mm), excluding antennas. ABS to UL 94-HB; IP45.
  • Weight: 170 grams (including batteries).
  • Battery: 2 x ‘AA’ cells – alkaline or rechargeable NiMH.



GSM mobile phone detector