n o t e 1 9 . c o m

iPhone does an excellent job displaying most PDF files. One issue with the iPhone PDF viewer is that it appears to ignore the PDF’s “Fast Web View” feature (aka byte serving). This means that in your iPhone you must download the entire PDF before you can view it. The Safari on Mac takes advantage of byte-serving and displays the 1st page almost immediately. I copied the iPhone PDF document (over 9 MB and was not byte-serving enabled) and optimized it using Acrobat 8. The result is a PDF just under 7MB and is byte served enabled. For comparison try opening this file on your iPhone vs your desktop Safari — you’ll need Adobe Reader to see byte-serving in action (click on the thumbnail).