Improvements with this firmware:

1. Added support for the AMP13 amp card.
2. Rectified the bug that there is a possibility that the digital filter isn't shown correctly on the drop down notification bar.  (Android OS)
3. Added more options to the Audio Control Button under system settings.  (Android OS)
4. Improved the quick charge compatibility.

Instructions For Firmware update:

1. Copy and paste the DX320_full_ota_2.01.792.zip to your SD card's root folder, or the DX320's internal memory.
2. Go to Android OS, press Settings-->System-->Updater-->local update, and tap the zip file.
3. The whole update will take about 10 minutes.  Reboot the DX320 after update completed. You can also choose to do a factory reset at this time to clear any artifacts from the previous firmware.