HS code-driven landed cost estimation

iPhone4 disassembly: revealing the mystery of internal components The HS code-driven landed cost estimationlaunch of iPhone4 has attracted great attention from users around the world. Its innovative design and powerful functions have made people Fascinated. However, for many people, iPhone 4 is still a mysterious device. Today, we will reveal the mystery of iPhone4, disassemble its internal components, and let you understand the internal structure of this phone and its components.First of all, we need to prepare some tools and materials: - an iPhone4 mobile phone - precision screwdriver and sharp-nosed pliers - some plastic cards and tweezers - a plastic wrench and a suction cup - after some alcohol and cotton balls are ready, we can start disassembling. Step 1: Remove the back cover. First, we need to use a suction cup to remove the back cover. Stick the suction cup on the back cover and pull it open with force. Then, use a precision screwdriver to unscrew the two screws, remove the camera cover, and then gently open the latch above the back cover with a plastic card to remove the back cover. Step 2: Remove the battery and the SIM card slot. The battery of the iPhone4 is fixed inside. We need to use a plastic card to remove the battery from the back. First, hold the latch under the battery with a plastic card and move the bottom of the battery away.Then, use tweezers to remove the adhesive and snap above the battery from above, so as to release the battery. Finally, take out the battery by hand. At the same time, we also need to disassemble the SIM card slot. Use a plastic card to gently open the buckle above the SIM card slot and remove the SIM card slot. Then, turn the screw at the bottom of the SIM card slot with a precision screwdriver to take out the SIM card slot. Step 3: Disassemble the screen component. The screen component is one of the most important parts of iPhone4, and we need to disassemble it. First, open the screen with a suction cup, and then gently open the latch of the screen with a plastic card and remove the screen. You need to be careful here. Don't use too much force, otherwise it will damage the internal parts. Step 4: Disassemble the step-by-step motherboard and parts. Next, we need to disassemble the step-by-step motherboard and parts.First, unscrew the four screws at the top with a precision screwdriver. Then, remove the rear lens and flash, loosen the cable at the top, and take out the motherboard from the bottom. Step 5: Remove the camera. The camera of iPhone4 is fixed on the screen module, and we need to remove it. Unscrew the two screws, hold the camera, and take out the camera module. Step 6: Remove the handset and sensor. The handset and sensor are also an important part of iPhone4. We need to disassemble it. First of all, gently open the receiver latch with a plastic card and take out the receiver. Then, use a precision screwdriver to unscrew the sensor part and remove the sensor. Step 7: Cleaning and assembly Finally, we need to clean the dust and dirt in other parts of the interior, as well as the welding surface and contact points.Some alcohol and cotton balls can be used to clean up these parts. Finally, we need to assemble these components in the opposite order. In summary, by disassembling the iPhone4, we can better understand the internal design and structure of this phone, as well as the functions and roles of its various components. At the same time, it also reminds us that if the mobile phone fails, don't easily try to disassemble the mobile phone, so as not to cause greater losses.

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