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The history of iPhone

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Apple has released many mobile phones since its first mobile phone in 2007

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The parameters, features and technologies used in each mobile phone are different

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Let's take a look at the parameters of Apple's various models

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and what new technologies are used

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In this video,

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we mainly explain the parameters of iPhone 2G to iPhone 5s

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If you are interested, you can take a look at this table,

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These parameters don 't have much significance for our actual maintenance

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We only talk about the characteristic of each model and the new technology used

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iPhone 2G is Apple's first mobile phone, the CPU is from Samsung

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The App Store was added for the first time in iPhone 3G,

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and we can download some applications on it

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The iPhone 3Gs is basically the same as the first two machnes,

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and the CPU is also from Samsung

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From 3GS onwards, Apple's mobile phones can shoot videos

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In iPhone 4, the front camera was added for the first time,

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and it used the first CPU designed by Apple

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Its codename is A4

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The iPhone 4 is also Apple's first phone with a glass back

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The iPhone 4s is powered by Apple's A5 processor

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and adds siri voice control

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iPhone 5 models are powered by Apple's A6 CPU

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Apple's 5th-generation mobile phone added a Lightning port for the first time

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The Lightning port is used to replace the old-fashioned data cable port

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After adding this port,

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there is an additional management chip on the motherboard,

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which is the USB management chip we often say

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the USB control chip is particularly prone to damage

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After damage, it will cause blue screen, white apple,

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and no booting after crash

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After replacing the USB chip, this fault will be eliminated

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The position number of Apple's fifth-generation USB chip in the drawing is U2

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Because the fault can be eliminated after replacing this chip,

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everyone later referred to all Apple chips as U2

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During maintenance, if we hear someone say to replace U2,

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we need to know that it actually means to replace

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the USB management chip

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iPhone 5 c, which is not much different from the iPhone 5

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For the first time, a colored back case was used

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and it was a plastic back case

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The iPhone 5s is basically the same as iPhone 5c

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The CPU of this model is Apple's A7 CPU,

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but this model has added the Touch ID fingerprint unlocking function for the first time

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The fingerprint button is bound to the CPU

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If it is damaged, this function cannot be used

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This is the introduction of iPhone 2G to 5S