You’d think this would be good fodder for a class action lawsuit, no?
You would think they would be partially liable for malware on their phones?
They make money counting on low income Americans going over their free rate tier, and advertising.
This seems right as it means you can sue the seller, they can sue their supplier if they too were sold a product that didn't meet the description of what they were sold.
That way the seller, who can afford to spend on expertise to make sure products are up to scratch, bears responsibility.
It's not perfect, but it makes sense this way IMO.