Seoul in Korea is much like this - when my partner and I took a surprise trip there, we were worried about getting around and purchasing a SIM as neither of us

Seoul in Korea is much like this - when my partner and I took a surprise trip there, we were worried about getting around and purchasing a SIM as neither of us spoke Korean, but there was rarely a place where there wasn't some sort of wifi access from the major telecom providers with both a paid and free version. You couldn't necessarily do things like youtube or Facebook over the public access, but things like maps, email, and messaging were all very doable.