If you put that phone on the nightstand next to your pillow, make sure you turn it to Airplane mode so it’s not signaling for WiFi all night long. I’m stuck... I had to replace my phone last year and it’s now switched itself to 5G. I never talk with it next to my head though. Headset or speaker only.
Why not wrap it in aluminum foil...or put it in a tin box...?
(That's a Faraday Shield for those in Rio Linda)