Tap the Dropdown menu (top-center) then select Received or With a remaining balance.
Tap the eGift image to display card details.
From the card details, tap Add eGift Card to Starbucks app.
If the app is not installed it can be downloaded from the App Store.
After registration, copy your Starbucks card number and 8-digit Code from Message+.
Existing Starbucks users tap Pay, (upper-left) then swipe right to enter your Starbucks Card Number and 8-digit Code from Message+.
To pay, hold the device in front of the countertop scanner at any participating Starbucks and scan the on-screen barcode from the Starbucks App.
For additional info on Verizon Messages (Message+), check out these FAQs.