I don't actually know this to be 100% true, I base this off the fact that my iphone (and android) still has plenty of reception in my microwave but is entirely

I don't actually know this to be 100% true, I base this off the fact that my iphone (and android) still has plenty of reception in my microwave but is entirely cut off when in my freezer. This behavior could be inconsistent across microwaves and freezers and blocking radio communication may not be a suitable proxy for blocking a CME that would be many orders of magnitude more powerful.