Non-ionising radiation does not harm people
If it's not ionising radiation, it's not going to affect people. The most damaging radio waves are infra-red, sunlight, x-ray, gamma rays due to how short they are. The frequency band of 2400Mhz is around 200mm in wave length, 13.000Mhz is around 10mm and so on. Mobile phones and such are close to 428 - 115mm range (700 - 2600Mhz). This means the frequencies used for mobile communications are to large for sells and DNA to cause and damage to them.
More details can be found here.
To calculate the wave length (in meters, millimetres and so on) of frequencies, please go here.