With the development of communication technology, mobile phones have become an indispensable tool for people in their work and life. However, in chemical plants, coal mines, tunnels (gas tunnels), integrated pipe corridors, oil wells and other inflammable and explosive places, mobile phones have become a hidden safety hazard. Ordinary mobile phones in the use of high-frequency electromagnetic waves, will produce radio frequency electric sparks, in the flammable and explosive places become a source of ignition. The explosion-proof mobile phone fundamentally solves the problem of fire source. The shape of the explosion-proof mobile phone is not much different from that of the ordinary mobile phone, but the material and physical characteristics used are very different from those of the ordinary model. Explosion-proof mobile phones use a variety of explosion-proof technologies, such as intrinsically safe circuits, limit the maximum surface temperature of the enclosure, use a "dust-tight" or "dust-proof" enclosure to limit dust entry, etc., to prevent the explosive mixture from being ignited, making the explosion-proof mobile phone in a hazardous environment. Can be used safely. As a communication device, a mobile phone is always in a state of receiving radio frequency or transmitting a radio frequency signal during normal operation. The radio frequency signal belongs to a non-ionizing radiation signal, and the electromagnetic wave generated by the radio frequency radiation is usually cut when cutting with any electrical component. A current is induced in the conductive member. When a short break or separation occurs in the part of the component in the normal connection, if the current is large enough, a spark can be generated. In addition, the internal circuit and battery components of the mobile phone may generate a large enough spark or thermal effect under normal operation or a certain fault. If the above situation occurs in a coal mine, an explosion will occur. Explosion-proof smart phone is a highlight of coal mine safety information management system, and it is also an important tool for realizing coal mine safety management informationization. In recent years, with the deepening of the national coal mine safety production standardization work, CONQUEST is also actively researching the production of safe, reliable, scientific and practical explosion-proof smart phones. Conquest (CONQUEST) controls the energy release rate of the energy storage component by adding a current limiting circuit. At the same time, the special material is used to protect the main board to avoid the short circuit of the circuit to generate explosive energy, thereby achieving the purpose of explosion protection. The explosion-proof mobile phone developed by CONQUEST adopts an increased current limiting device to enhance the circuit safety guarantee system and limit and eliminate the unsafe hidden danger of mechanical contact ignition. When the battery has an unexpected fault such as overcurrent, short circuit, overvoltage, etc., the fuse and the transistor are automatically cut off to avoid the device that ignites the dangerous gas. To ensure the safety of production in industrial users and industrial environments. The shell of the CONQUEST explosion-proof mobile phone is also anti-static, reducing the surface resistance and making it meet international explosion-proof standards. The safety performance of the explosion-proof lithium battery has passed the 3,200 non-sparking test and has reached the national explosion safety technical standard. The explosion-proof mobile phone adopts high-protection 6-sided 12-group three-dimensional skeleton. The outer casing is made of hard plastic with high strength and toughness. It is wrapped with high-density TPU soft shock-absorbing plastic on the outside, and the two are disposable by high protection technology. Injection molding, with strong anti-pressure performance. In addition, mine intrinsically safe explosion-proof smart phone, load one-touch intercom, external camera, support NFC multi-card aggregation, Beidou + GPS dual-mode navigation, collect relevant information for emergencies, Downhole staff can use the network to achieve Internet access, Video calling, monitoring production scheduling command system and ventilation monitoring system are important tools for Downhole safety production communication.