Since it's Willcom, this thing will not be packing a SIM card per se, but rather one of their W-SIM units. The W-SIM modules are the size of a matchbox, and contain the PHS radio in addition to any subscriber information. That means this speaker phone will be incompatible with any GSM, UMTS or CDMA network, and seriously 'Japan only'...
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Since it's Willcom, this thing will not be packing a SIM card per se, but rather one of their W-SIM units. The W-SIM modules are the size of a matchbox, and contain the PHS radio in addition to any subscriber information. That means this speaker phone will be incompatible with any GSM, UMTS or CDMA network, and seriously 'Japan only'...
Actually, it should be capable of use in any country with PHS (Taiwan/Thailand/China). Not quite worldwide, but not quite Japan-only either.