Looking to buy a new cell phone, but I want to make sure it'll work in Japan when I'm heading there next year. Everything I read says Japan is CDMA only, but frequencycheck.com shows only LTT and UMTS bands for the two biggest carriers Softbank and NTT. How do I know what phones will and won't work on their network? Specifically, my wife really likes the razer phone, which is a GSM only phone. I've also read that the OnePlus 6 works, but it looks to have a very similar frequency support list to the razer phone.