Answer
#(1) get a data cable to connect to a pc/laptop to transfer mp3 from that pc/laptop.
or
#(2) get a bluetooth connector for a pc/laptop (if you have bluetooth enabled phone) to transfer mp3 from that pc/laptop.
or
#(3) get a card reader (if your phone support flash/sd card) for a pc/laptop to transfer mp3 to that card.
