A PDF file from your email stays in that email only and doesn’t get saved anywhere in the iPhone. You manually need to save PDF file.
Here’s how you can:
- Step 1: First, go to the email and open that PDF file
- Step 2: There is an option to share that PDF file on the left bottom.
- Step 3: Here you can find different options to share file such as iBook, Mail, etc.
- Step 4: Select Import with iBooks option and this PDF file will Continue Reading