Which phones support Hi-Fi?
What is Hi-Fi mode?
Which phones support Apt-X?
How to turn on/off Hi-Fi?
How to adjust the Audio effect?
How to turn on DeepField audio effect?
What is Deep Field audio effect?
How to adjust Equalizer?
What is DeepField audio effect?
How about the quality of Hi-Fi and power consumption when Hi-Fi is on?
How can I lock the focus on camera?