You could use your plan's minutes, messaging and data by adding the Travel Pass which is $10 per day only on days used or you can get a SIM from carrier in Spain but you will NOT be using your number.
JUSPOL16, I have great news about your iPhone 7. As sprmankalel stated, you can use your phone with TravelPass. http://spr.ly/6587DQPyP However, I want to make sure we explore the best options for you. Here is a great place to start. http://spr.ly/6588DQPyu Are you traveling to any other countries? How do you plan to use your phone?
Follow us on TWITTER @VZWSupport
If my response answered your question please click the _Correct Answer_ button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!