Why can't I open an attachment on my Yahoo email acct while using my Android phone?

[Android Central Question]

Have PDF file attachments that I received per email but nothing happens when I click on them.

Please advise.

 

[B. Diddy]

Welcome to Android Central! Which phone? Are you using the Yahoo Mail app, or the stock Email app?

 

[Rukbat]

And do you have a .pdf reader app? Phones don't open files, apps do, and phones don't come with a .pdf reader.