TOKYO--(BUSINESS WIRE)--NTT DOCOMO, INC. (DOCOMO) announced today that it has added Wi-Fi ® functionality to its Japan Welcome SIM TM prepaid SIM card service to provide travelers to Japan with fast ...
Japanese operator Docomo wants to free your SIM card from your phone to help manage your presence across multiple devices. Today, it announced a prototype Portable SIM device it hopes will one day do ...
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