Magnets are not “microwave RF”
The higher you get in frequency the more potential for damage.
The 5G phones are dangerous. (yes, I own one)
Magnets attract steel but they do not warm human tissue.
The last thing you want to expose to microwave is your heart. I hate cell phones, for other reasons. But I no longer place a cell phone over my heart.
Nor does my wife.
Dave K.
Who says the phones were on?