Online upgrade:

Local upgrade:

(Please download the firmware file to the mobile phone first)

1. After the BTR7 is connected to the mobile phone, open the FiiO Control app and then follow the pictures below to upgrade the BTR7.

2. Click settings

3. Click firmware upgrade

4. Click local upgrade

5. Select the firmware file

6. Click 'confirm'

7. The firmware upgrade takes 3-5 minutes