Generally MindStick don't provide such facilities to their users, MindStick takes excellent care of the privacy of their users, so MindStick doesn't reveal contact details of any user.
If incase you need to show-up your contact information so that users contact you.
You need to upgrade your account so that you can save changes and make your contact details public.
Upgradation your profile doesn't cost you enough, just a nominal amount and you are upgraded.
After upgradation you must uncheck the privacy section from your profile so that contact info is public now.
When you complete your upgradation, you have the benefit to public your contact details, so that one visiting your profile can easily contact you.