There are mainly 3 steps.
1. On the FiiO Music app of the M15S, Settings->FiiO Link->┆ (on the upper right corner of the display), choosing Bluetooth as the Server.
2.Connect the M15S to the mobile phone through Bluetooth.
3.On the FiiO Music app of the mobile phone, Settings->FiiO Link->┆ (on the upper right corner of the display), choosing Bluetooth as the Client.
Notes: iPhones only support FiiO Link WiFi function but not Bluetooth.
