How to read PDF file on your phone?

PDF is a commonly used file format, you would receive pdf file from email on your mobile phone, but how to read pdf file on mobile phone? We really need a third party app to help, read How to Read PDF File on Your Mobile Phone: http://www.amacsoft.com/ebook/how-to-view-pdf-files-on-your-mobile-phone.html
 to know more. Wish it help!