You can fill out forms and sign documents that you receive on your iPhone. After you complete a form, you can add your signature and share it with others.1. Why is there a notice? 2. What is this lawsuit about? Simply open the PDF file on your iPhone or iPad. If you're prompted to save the document in the Files app, choose a folder and tap Save. Homework Reading1.pdf. Simply open the PDF file on your iPhone or iPad. If you're prompted to save the document in the Files app, choose a folder and tap Save. If your flight is international, fill out your passport and visa details if applicable.