, PRC natively,  Audible (Audible Enhanced (AA, AAX)),  DOC ,  DOCX ,  JPEG ,  GIF ,  PNG ,  BMP , non-DRM  AAC ,  MP3 ,  MIDI ,  OGG ,  WAV ,  MP4 ,  VP8 . [6] Some users of the Kindle Fire report having problems with  Wi-Fi , including inability to