Why Use Mobiles in Missions? Whether a feature phone or a smartphone, the majority of web use now happens on mobile phone screens. Too few Christians and ministries leverage the opportunities that this device provides their outreach. Hundreds of millions of unreached people have access to the digital world for the first time. What will they find? As followers of Christ we have the chance to offer the hope and freedom found in Christ. We define mobile ministry as the use of mobile technology to fulfill the Great Commission and the Great Commandment. By the way, for us mobile technology is mobile phones (feature phones and smartphones) and the tablets.