Line losses are now the single greatest threat to the mobile sector’s growth, and major carriers must overcome the ceiling under which they now find themselves and the growth of their business. The solution lies not in voice-centric mobile devices but with new non-phone data-consuming devices like tablets, e-readers and machine-to-machine technology like digital picture frames, personal navigation devices and more. Tier 1 carriers — Verizon, AT&T, Sprint and T-Mobile — face a number of challenges, including a lack of control over distribution, disruptions to traditional pricing models and the unique nature of M2M deployments. For them, success will rely on experimenting with business models and the ability to quickly adjust data plans to drive profitability and growth.