You know how your 65" tv is actually 64.5 inches?
That's called rounding.
Now, imagine your TV was advertised as 4Ke when it was actually 1080p.
That's called false advertising.
That's called rounding.
Now, imagine your TV was advertised as 4Ke when it was actually 1080p.
That's called false advertising.
This happens with projectors. Many projectors are advertised as "4K" when in fact they only accept a 4K signal, but still project a 1080p picture.
Some of them have a kind of hacky trick which involves vibrating the image chip, so that it can project a second set of pixels offset from the first by half a pixel, which gets you a ~2K picture - kinda sorta.
Until some idiot decide 1080P is just, 1080P, and 2K now stands for 1440P. You can see this now common in Phone Spec, Gaming and many other resources.
5G means basically whatever AT&T wants it to mean, just like how the definition of 4G magically and retroactively expanded back to include HSPA phones when verizon or whoever decided it should.
But it doesn't. 5G is an actual term (also known as IMT-2020 because of the release date) as defined by the International Telecommunications Union. 3GPP, who create the mobile standards like GSM/HSPA/LTE, also bases its standards on these IMT requirements.
It doesn't need to be a trademark to be used to deceive customers in a fraudulent manner.