The leather cases on the LG G4 were "vegetable tanned," which means they were lathered with vegetable dye to help the leather withstand humidity. LG said it only used high-quality cowhides, which it said has 0.001 micrometer (one millionth of a meter) pores that allowed the leather to "breathe."The company said the leather ventilates well and won’t spoil from long use. A process called "edge coating" was also used, which prevents the leather fraying at the edges. This helps guard against minor scratches as well as damage from water splashes.

LG's 640,000-square-meter Digital Park is home to 10,000 employees working on projects related to televisions, mobile and auto components, A small part of Digital Park is LG's mobile assembly facility, the largest of its five mobile assemblies found around the world, Two main parts of the G4 drop in at the beginning of the assembly line -- slim armor case for apple iphone 7 - gunmetal the front of the phone and the "main board," which contains key components, The workers, who work in pairs at each station, scan the parts before assembling them..

An LG worker examines the back of the G4 to ensure everything is up to snuff. There's a lot of pressure to move quickly -- the target for G4 units assembled that day is nearly 15,000. The G4 has to pass through several stations, including ones that test the various radio signals and another more basic video and audio check. Another station adds a SIM card and battery, while another automated system prints the LG logo at the bottom of the phone. Once there are enough G4 units to fill a cardboard box, an Auto-Guided Vehicle comes around to pick up the box and ferry them away. It follows a track of gray duct tape on the floor to its next destination.

As the work in progress moves down the line, another worker installs a SIM card and battery, while another places each phone in a little box to test the wireless signals, Further along the assembly line, you can hear a woman say "ahh" over and over again -- a short video clip that plays once on each unit to ensure the audio and visual capabilities are up to snuff, For the most part, the employees -- almost all women -- work in pairs, It resembles that famous chocolate-wrapping scene with Lucy and Ethel in "I Love Lucy" -- only these workers operate with machine-like efficiency, The plant, located an hour south of Seoul, has 25 assembly lines able slim armor case for apple iphone 7 - gunmetal to produce 3.5 million smartphones a month, making it the largest of LG's five mobile-focused manufacturing facilities around the world..

"We tried a line with just men, but production fell by 20 percent," an LG plant manager tells me through a translator. The work, she explains, requires delicate fingers with a unique blend of speed and dexterity. At the end of the line, the smartphones are stacked together in a black cardboard box. When the box is filled, it's picked up by a small, auto-guided robot , which whirs away as it rolls across the factory by following a track of gray duct tape on the floor. Those robots aren't just carrying away a box full of LG's latest flagship smartphones. The G4, which will be unveiled at six events around the world later today, represents the company's best shot at keeping pace with the titans of the smartphone industry.