[9nGQluzmnq3M]

FOMA was an UMTS implementation also shepherded by 3GPP. This didn't stop it from being incompatible.

Put another way, the W3C is supposed to set global standards for web browsing, and we all know how compatible browsers are...

[qtwhat]

True. But note that in 3G and 4G period, there are a number of systems that are not compatible to each other, like UMTS vs CDMA, LTE vs WiMAX, while 5G is the global one.

[setr]

Afaik, browsers have pretty solid compatability these days. I mean, they’re all chromium skins, but nonetheless