Hopefully something here will help you:
part II of #2 = http://www.quantumbalancing.com/news/newcelldangers.htm
What is the section of EMS of satellite phones?
In the GHz range
What wavelength and frequency does it use?
around 1.6GHz, 2.4GHz and 0.8 GHz
are there any dangers (not a good word, talk in terms of hazard and risk - if you don't know what they mean then look them up)
when using it? They are quite heavy [the hazard] and hurt when dropped on the foot [the accident]. Risk is very low.
to what/whom? Not to humans. The ones on 1.6 Ghz cause quite a lot of interference to radio astronomers who monitor similar frequencies.
What is the wavelength and frequency of pagers?
138 MHz, 153 MHz 454 MHz
are there any dangers in using it? Again to what or whom?
The risk is very low There is no credible evidence of harm to humans. Radio Amateurs have been using similar frequencies at much higher power than a pager for decades. Most pagers are receive only so no hazard.
Is there any danger in using cordless phones? Hazard is the antenna, accident eye damage, risk is low.
These operate in 3 main frequency ranges. 49 MHz (older versions), 900 MHz and 2.4 GHz. Risk is very low.
What is the wavelength and frequency of Radar waves?
Mostly K and X band (see (Broken Link Removed)
What is the wavelength of MRI?
The frequency used depends on the field of the magnet and the isotope being imaged. As an example 63 MHz for a 1.5 tesla field for protons.