You can update your device's photo, name, number and time zone in the app. If it's blue, it can be updated. Follow these steps for Apple devices (iOS):

Step 1

Open your app and tap on "More" on the card)

Step 2

Tap on the "Device Details"

Step 3 - Photo

Tap on the photo icon - you can use the camera or an existing photo 

Step 4 - Name

Tap on the name, update it and tap on update

Step 5 - Number

Tap on the number, update it and tap on update

Step 6 - Time zone

Tap on the time zone and select your time zone from the list