I bought this pdf from SABS South Africa, the file contains the electrical unit standards and I cant walk around with my laptop all the time. The PDF has a username and password field on page 6, which connects directly to SABS website to be able to unlock from page 6 to 397. Why cant i type into the username and password fields on my mobile??
Is the PDF document "protectedPDF" by Vitrium?
Currently, Acrobat DC mobile products (for iOS and Android) do not support PDF documents with DRM (Digital Rights Management) by third-parties.
I am not aware of any other free mobile apps that support "protectedPDF" documents.
I'd recommend using the desktop version of Reader on a Windows or Mac computer to view the PDF documents. Sorry for the inconvenience.