International roaming in Japan


    I am currently in Japan. I have T-MOBILE plan to be able to text and message. But I don't get any signals. The only way to communicate is when I am on WI-FI. How when I am out of hotel I cannot communicate. I was adive to roam using Docomo or Softbank; T-MOBILE roaming partners. I attempted to search for them but have not found them. Request assistance.

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