Axis, a ministry that provides support for parents and those in ministry in navigating teen culture with the purpose of keeping kids safe and strengthening relationships has produced a series of videos on technology, specifically the smartphone. I found these videos to be a great resource in framing discussions with your child about smartphones and technology. I highly encourage you to check them out and to consider signing up for their newsletter: The Culture Translator. It provides insight into what's current in the world of pre-teens and teens so parents can be equipped with tools for communication.
You will need to sign up, but it's free and easy to do.
Scroll through to read, or click to expand and download.