Why am I unable to open attachments from my Note 4 device?

[AC Question]

My boss has been trying to open an attachment from his email on his Note 4 device and is unable to do so.

 

[nahoku]

Depends on what kind of attachment it is. Naturally, if the phone doesn't support whatever file type it is, he won't be able to open it. He might need an app that opens that particular kind of file type.