Audible does not download audiobook on mobile data I'm using Audible for Android, and when I purchased a book, I'm not able to download it over mobile data.

I have ensured that background data is enabled both system-wide and for Audible, but Audible still would not download. After I tap Continue on the "Data Usage Notice", Audible only shows the following on the book:


Waiting to download...
Retrying 2 of 5
Retrying 3 of 5
Retrying 4 of 5
Retrying 5 of 5
Retrying 6 of 5 (huh?)
Invalid data format


Is there anything else I should do to have it download the audiobook over mobile data? Or is it possible to do it over WiFi only? (I can download over WiFi without any problem.)

It is possible that my mobile network service provider actively blocks Audible downloads, however, there were no reports about this that I could find online.

My device is OnePlus 2 running stock Android Marshmallow.
I don't think it is a mobile data issue, since

You have not reported any problems with any other downloads on data

It is more likely a format issue (error says Invalid Data Format) and Audible website says Not all portable devices support all formats. Details below


What is an Audible format, and how do I choose the one that best suits me? says

Audible offers four different types of audio formats to choose from, depending upon the device you wish to use to listen to your audiobooks. The audio format is determined by the rate of compression.
Note: Not all portable devices support all formats.

These formats correspond to quality as in AM, FM, MP3, CD
To change these formats one would need to log in desktop site per instructions on the linked page (in essence, Library →Audio quality drop down menu)