Verizon/Frontier was doing this for a while, too. I would regularly get some shitty Frontier search results page instead of what I was looking for, even when the URL I was visiting was working fine on my phone.

At least they no longer insert ads straight into web pages. Thank goodness for https.

Does anyone know if T-Mobile does this too? I'm considering moving fiber to them instead of AT&T, but have stayed mostly due to "better the devil you know..."