Why cant i open scanned document attachment on samsung galaxy 4

[AC Question]

Scan document attached to email don't open on Samsung galaxy 4. When I click Preview the message come "failed to change the setttings. try again.

 

[Rukbat]

Phones don't open documents, apps do. Evidently you have no app that can open that type of file. (Most scanned documents are .pdf files, so try installing Foxit MobilePDF.)