[avian]

If your phone emits any non-trivial amounts of RF power at 100 kHz-1MHz frequencies, regardless of whether this comes from intermodulation products or something else, it doesn't pass existing EMC regulations and can't be legally sold to consumers.

This is something that is already (or should be, in theory) rigorously tested for everything that's put on the consumer market (from your cheapest USB charger to your iPhone).

[jcims]

But we're talking about what happens after that GHz RF is absorbed by the tissues/fluids in the body. That becomes much more complex. It's not unlike the laser attack on MEMS microphones or a crystal radio powering a speaker in the audio range after receiving AM RF at 1Mhz.

Realistically we've been beaming our brains for decades now without a glut of brain tumors, but we might just be getting lucky, and if we don't know what to look for it could bite us later.

[lima]

Not a given if said USB charger is cheaply produced in China.

[avian]

Yes, you can debate how much imported (or for that matter, domestically produced) stuff is actually tested, but the fact remains that existing laws and regulations do cover this, even if enforcement is maybe lacking.

[lima]

I'm an ham radio operator, and shortwave spectrum pollution is sadly a big problem despite very strict regulations.

The unfortunate reality is that the market is flooded with noisy devices, often cheaply produces overseas, that vastly exceed legal limits (chargers and other rectifiers, plasma televisions, powerline adapters, and much more).

Enforcement is difficult due to how widespread these devices are.

In many places, the noise floor is to high that long-range shortwave radio communications all but impossible.

[craftinator]

Or cheaply produced in the US... Most tech I've bought from Shenzhen recently has been of better quality than domestically produced equivalents

[zaptidizap]

I think police cars should measure it.

[lima]

It can take hours to pinpoint the location of a specific transmitter with skilled equipment operators.