Minimising the time that you hold the phone to your ear can be achieved in many ways - you don’t have to stop making phone calls.
Wi-Fi has become so popular that it is very difficult to escape its effects. Even if you have no Wi-Fi in your house you may be still covered by your neighbours network - in some homes you can even pickup 8-10 neighbourhood networks.
If you are electro-sensitive this may be a problem, it's all down to the signal strength. As the signals become stronger, more people are noticeably affected. The worst space to be in is very close to the Wi-Fi router as the signal strength here is many times stronger than needed to successfully connect.
For other people's Wi-Fi you don't have many remedial options:
For your own Wi-Fi you have more options:
Luckily Wi-Fi has a relatively short range especially with walls in the way - maybe up to 50m (50 yards) in ideal conditions but often down to 5-10 yards/meters in brick buildings.
To use Wi-Fi sensibly to minimise any risk to your health or wellbeing you should bear the following in mind:
Powerline adapters are cheap devices that send your network data over the house wiring, not requiring significant radio transmission.
There are a wide range of cordless phones on the market around the world, using many different types of radio transmission. They all transmit a radio signal when being used and some transmit all the time!
So, in general it is important to use them carefully, treating the mobile part as you would a mobile phone, and the base station as if it were a mini cell tower - i.e. keep it away from your living area or bedroom.
These devices can be extremely useful but … be aware they can affect your health and sleep patterns, so try living without them for a few days and see if you notice any difference.