13. How to update the firmware of SP3 BT?

The Bluetooth firmware could be updated via FIIO Control APP. 

Online upgrade：

1. Connect SP3 BT to Bluetooth in the phone settings, download FiiO Control App on your phone, and connect to SP3 BT. On the SP3 BT page, click the settings pattern in the upper right corner, find "Firmware Upgrade", find "Online Upgrade" and click it. If SP3 BT has available Bluetooth firmware, a pop-up window will prompt you for the new version. Click OK to upgrade.

Please note: During the firmware upgrade process, please do not leave the upgrade interface, otherwise the upgrade may fail! The upgrade may take a long time, please be patient. If the upgrade fails, you can try again.

Local upgrade:

1. Import the "SP3_BT_Vxxx.bin" firmware into the mobile phone;

2. Connect SP3 BT to Bluetooth in the phone settings, download FiiO Control App on your phone, and connect to SP3 BT. On the SP3 BT page, click the settings pattern in the upper right corner, find "Firmware Upgrade", find "Local Upgrade", select the firmware imported to the phone, and start upgrading the firmware.

Please note: During the firmware upgrade process, please do not leave the upgrade interface, otherwise the upgrade may fail! The upgrade may take a long time, please be patient. If the upgrade fails, you can try again.