Complex sentence: The Bluetooth radio is still used for device discovery, initial connection and profile configuration, however when large quantities of data need to be sent, the high speed alternative MAC PHY 802.11 (typically associated with Wi-Fi) will be used to transport the data.
Split into simpler sentences: The Bluetooth radio is still used for device discovery, initial connection and profile configuration. However when large quantities of data must be sent, the high speed alternative MAC PHY 802.11 (typically associated with Wi-Fi) transports the data.