Question: Does AT&T Phones work in Japan.
Answer: Yes, AT&T phones work in Japan. If you have international roaming, the phone will work. If you want a local SIM card, the phone must be unlock to insert local SIM card from Japanese carriers. The biggest problem in getting a local SIM card is that it required a Japanese National ID card. You can only get a Japanese National ID card if you have a visa longer than 3 months.