Cool that phone is a nice find. I also find having a separate audiobook phone nice (smaller, better battery life,no notifications when I'm 'reading'). But I went for the Samsung Galaxy S3 mini. It's really underpowered but super tiny so can fit in a pocket with my other phone, has a great battery life, and expandable sd card. I haven't paid for a 2tb sd card but a 512 gb works fine and is almost full now

The Android app 'smart audiobook player' is a godsend, really thoughtful app. And you can use an equalizer to reduce high pitch tones which I find easier to listen to