I have an iPhone, that's my first problem. I am in the military and there is a PDF I am trying to view on my phone, but it gives me the Error, "This form requires Adobe Acrobat Reader DC for Mac or Windows." I press okay and I am taken back to the main page. Why am I not able to open this document on my phone? Also, next to the document, where I can select to open it, there is a closed padlock next to it, I assume because it is Digitally signed. Is there a way to view this on my phone? Am I just out of luck with this particular document? Thanks for your time.