1. Device model ; TG&CO TG-L900S (Made by FIH)
2. ROM version (Android version, stock/OTA/Custom ROM) ; 6.0.1
3. Why do you think your device supports Hi-Res (link to device features, etc.)? A copy of your device's /etc/audio_policy.conf file may be helpful.
; Qualcomm Snapdragon 652 / refer to attached "audio_policy.conf" file
audio_policy.conf