• You should be aware of the obstructions in the location where the cordless phones are to placed. The more the obstruction, the lesser should be the frequency range. It happens because the wavelength of lesser frequency is longer and thus can travel around obstructions better.
ou should be aware that cordless phones are actually a conglomerate of small radio transmitters and receivers. So if you use a cordless phone of lesser security, then anyone with a scanner can trespass and trace your conversation. Though, most advanced radio scanners can access frequencies of 512 MHz or the 900 MHz. The scanners are not that advanced to cover the 2.4 Ghz frequency range. So, to ensure your security, you should go for cordless phones offering higher frequency ranges than 2.4 Ghz.
