Not much left to with the firmaware, just 3 issues to be adressed which are sorted by priority (as per mho) are:
1) Battery indicator
2) missing miliseconds at start of irst song playing
3) proper artwork resizing without cutting off parts
And somehow on my unit I don't get the auto resume to work, regardless which time I set. Not sure if that's a general issue.
And Shanling please add options for bluetooth to set default volume by 100%
For now, any time if i use bluetooth speaker i need manually increase it to 100%, and if i use headphones i need it slow down back to 20%, is terrible.