There's a thing called a white line on your cell phone. What is it? Please guys, thank you.

It's a cable! Generally is a flip cover or slide phone only have, is the phone motherboard connected to the display of things, some cell phone keypad is also connected with wires! The cable, also known as flexible circuit board (FPC). It is in accordance with the specifications of the industry rules, line order, line color, line number, etc., for moving parts and activities within the region of data transmission, such as computer internal motherboard connected to the hard disk, optical drive data lines, cell phone motherboard connected to the display of the data line, as well as connecting the data line between the equipment are collectively referred to as wires. Characteristics of the cable: The cable is small in size and light in weight, and the cable board was originally designed to replace the larger wire harness wires. In today's cutting-edge electronics assembly boards, cable is often the only solution to meet miniaturization and mobility requirements. Wire bonding (sometimes called flex printed circuitry) is a copper circuit etched onto a polymer substrate or a printed polymer thick film circuit. Design solutions range from single-sided conductive circuits to complex multi-layer, three-dimensional assemblies for devices that are both thin and lightweight and whose structures are compact and complex. The total weight and volume of the row of wires can be reduced by up to 70% compared to conventional round conductor wire harness methods. The wires can also be strengthened by using reinforcing materials or backing plates for additional mechanical stability. The cable can be moved, bent, and twisted without damaging the wires, and can conform to different shapes and special package sizes. Its only limitation is the volume space issue. Being able to withstand millions of dynamic bends, the wires are well suited for use in inline systems with continuous or periodic movement as part of the end product functionality. Solder joints on rigid PCBs are subjected to thermo-mechanical stresses and fail after hundreds of loops. says Jenny, Product Manager at EECX, "Certain products requiring electrical signal/power movement with small form factors/package sizes benefit from a row of wires." The row of wires has excellent electrical, dielectric, and thermal properties.LT Electronic's CEO said, "The lower dielectric constant allows for fast electrical signal transfer; the good thermal properties allow for easy cooling of the component; and the higher glass transition temperature or melting point allows the component to operate well at higher temperatures." The row of wires provides greater assembly reliability and quality. Rows reduce the amount of hardware required for internal connections, such as solder joints, relays, backplane lines and cables commonly used on traditional electronic packages, allowing rows to provide higher assembly reliability and quality. Because traditional inline hardwares made up of complex multiple systems are prone to higher rates of component misalignment during assembly, Ping.Wu, marketing manager for the EECX Electronic Products Division, said, "The low stiffness and small size of the row of wires is also the reason why the row of wiring board components are smaller in size, and therefore less material is used." With the advent of quality engineering, a flexible system with a very thin thickness is designed to be assembled in only one way, eliminating many of the human errors normally associated with stand-alone wiring projects. The use of wiring is increasing dramatically ...PING, Managing Director of EECX.COM, says: "When you pick up almost any electrical appliance today, you will find wiring in it. Open up a 35mm camera and there are 9 to 14 different wires inside because cameras are getting smaller and more functional. The only way to reduce size is to have smaller components, finer lines, tighter pitches, and objects that are bendable. Pacemakers, medical devices, video cameras, hearing aids, portable computers-almost everything we use today has a cable in it". Row life The life of a row of wires is typically 5,000 to 8,000 openings and closings, or about a year and a half if you open and close the wires an average of 10 times a day.