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.To activate this function, pleaserefer to theinstructions of your mobile phones manual to make sure your phone program supportsthisfunction. . Whenthetriplephoneconversationisonboard,itcannotreturn to the mode of having onlyCall orCall 2. . Whenthe triplephoneconversationhas notbeenactivated,you can press the decrease (-) volume key for 2~3 seconds to easily transfer the calls betweenCall andCall 2. 2 13 . If Call 1 is maintained and Call 2 is on line, quickly press the function button to end C