I added a formula field the contact object and made it as hyperlink. Now I want this to happen for contact mobilephone field
Create new formula field to show phone number hyperlink.
If phone is your contact number field, then the formula field will be something like
You cannot directly hyperlink on Mobile Phone field in SF. You have to build Chrome plugin or custom SF component/page for it.
Use field TEL. or simply create a text field (A) and create a formula field (B) and write the following formula :