The BlackBerry Bold 9900 also supported third-party ringtones, which could be downloaded from various websites or created using third-party software. These ringtones could be transferred to the device using a USB cable or Bluetooth.
Unlike generic MIDI ringtones of the early 2000s, BlackBerry’s audio team designed polyphonic and later stereo MP3 ringtones with a : original ringtones blackberry boldzip 40