STEP 1. First you have to create an email and attach the PDF file, then send it to your email id.
STEP 2. You should make sure that you have the email account set up with your iPhone and you are connected to the internet. Now from the main menu of your iPhone simply click on “Mail” icon.
STEP 3. In order to access the email account simply tap on the “Account” option. Now tap on the “Inbox” option and then tap on the message that contains the PDF.
STEP 4. Now simply tap on the PDF attachment, then the PDF file will open on your iPhone.
That’s it. In order to navigate through the PDF file simply press “Up” or “Down” buttons. In this way you can read PDF files on iPhone. If you found any difficulty in following the above steps then feel free to ask in the comment section below.