Mobile Interactivity Links not Working on PDF

Hello,

I have a pdf that needs to link to phone numbers as well as email addresses using links. When opened on mobile, neither link works. Ideally, I would like the links to open the user's email and automatically call the phone number. This is hosted on a website. 

I have tried the mailto: and tel: links in acrobat and neither work for mobile. The email function works on desktop (mac) and will open facetime for the phone number. I have optimized the pdf for mobile also. The original document is an illustrator file, so no InDesign bookmarking.