T-Mobile free line BOGO news is a reminder that multi-line offers work best when the savings are easy to understand. Customers often hear “free line” and get interested fast, but they still need help understanding who it fits, what it requires, and what the real monthly picture looks like. Dealers can use this moment to run a simple Multi-Line Value Check: review household needs, line count, and total bill impact. The opportunity is not just the headline. It is clarity.