If you want to use the smartphone at home/office, for surfing the net, watching videos, social network, or for other needs, but without the exposure to constant RF radiation from a smartphone, you can connect the phone to the wired network using an adapter (network cards) and a cable.
See more info :
Network Adapter/cards for android – https://amzn.to/3SWxVs3, https://amzn.to/3FyWtUM)
Network Adapter/cards for iPhone – https://amzn.to/3zB9HwB).