How can I control playback of speaker from lock screen of my phone?
You can control the playback of speaker from the lock screen of smart devices.
You need to enable the option on the setting menu on Music Flow Player application.
1. Run Music Flow Player application.
2. Tap [Settings] > [General].
3. Move [Lock Screen Settings] switch to the right and turn on.
You can control the speaker playback from lock screen of smart device,
▶ This feature is available in Android 4.0 and higher