It appears that the User's Guide for CC3120BOOST (document SWRU457) has the SW2 and SW3 functionality swapped in Table 1. It says SW2 will reset the device and SW3 will put the device to the boot loader mode for flashing the firmware. In reality these two descriptions are swapped. Also SW2 and SW3 markings on the silk screen image of the board shown on page 4 of the document do not match the silk screen on the real board, at least on Rev A of the real board.