Looking for a 3 line cell phone plan? Compare wireless plans with 3 lines using the MyRatePlan cell phone plan comparison engine below. There are a wide variety of cell phone plans for 3 people, including shared data plans, unlimited data plans, and unlimited talk and text plans. The tool below is showing cell phone plans with 3 lines by default. If you want to compare cell phone plans for a different number of lines, feel free to change the number of lines in the tool. You can also click advanced and filter by a specific carrier to compare 3 line cell phone plans for just that carrier.