How many GHz is harmful to humans?

X-rays are high-frequency , and thus high-energy, electromagnetic radiation. They have wavelengths ranging from 0.01 to 10 nanometres, and thus frequencies from 3×1019 to 3×1016 Hz.

Electromagnetic spectrum Type of waveFrequency rangeWavelength RangeRadio Waves300 GHz to as low as 3 kHz,1 millimeter to 100 kilometersMicrowaves(0.3 to 300) GHz1 mm to 1 mInfrared300 GHZ to 430 THzVisible Light(430–790 THz390 to 700 nmElectromagnetic spectrum – Art of Problem Solving artofproblemsolving.com › wiki › index.php › Electromagnetic_spectrum

X-ray, electromagnetic radiation of extremely short wavelength and high frequency, with wavelengths ranging from about 10−8 to 10−12 metre and corresponding frequencies from about 10 16 to 10 20 hertz (Hz).

Scientific evidence suggests that cancer is not only linked to mobile phone radiation and that other factors also may be involved in its development. Most mobile operators use from radiofrequency waves in the range up 300 MHz to 3 GHz that can be harmful for human health (1).