Samsung SPH-I330 - Manual (Page 2)

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Important Information Regarding
the Local Serial Connection
For the i330 to properly HotSync with another computer, it must be setup
to connect using the Local Serial option in the HotSync configuration
settings. If this option is not selected, the i330 will not connect to the
other computer. The cable that connects the two devices was designed to
connect to a USB connector, thus allowing easier installation. It does not
however use a USB connection to HotSync the two devices together. The
devices still use a Local Serial connection to transfer and receive data. To
properly configure this option, see "Perform a HotSync the First Time" on
page 150.