Can I edit the contact method?

Within a prospect's page, you can change the email address, phone number, or social platform you used to contact the prospect. You can also suggest a contact update to change the information within the platform for that specific prospect. 

To change the email, phone number, or social platform used when contacting the prospect, start by clicking "Add Note/Log Activity":

When you select your activity type, you'll be able to change the existing value and type in the new email address, phone number, or social platform. Below, you'll see that the email can easily be changed once I select Email as my activity type:

The same can be done for email, phone call, text message, and social media interaction listed under Activity Type.