From the Friends tab, navigate to your Custom Profile's name in your Friends list and open their profile.
Tap on the three dots [...] in the top right corner of the screen.
Tap “Edit custom profile” at the bottom of the screen.
Edit the information for your Custom Profile as you would your own Profile.
To upload a photo for your Custom Profile: Tap “Profile Photo” at the bottom of the screen. Tapping “Use This Photo” will keep the profile picture the same; to choose a new photo, tap “Change Photo”, then select “Choose from Library". Select the new photo then tap “Use This Photo".
Tap “Save” to complete the process. * Note: You can only change a friend’s photo if they are a Custom Profile.