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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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In this video,

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we mainly explain the parameters of iPhone x to iPhone 11 Promax

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

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It doesn't have much significance for our actual maintenance

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We only talk about the characteristic and the new technology for each model

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The iPhone x model uses the A11 CPU and the bangs design

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For the first time, a 5.8-inch OLED screen is used,

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and it is a full screen

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OLED refers to a flexible display screen

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The screen is self-illuminating,

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and there is no backlight circuit in the mainboard

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The mainboard of this model adopts a stacked double-layer mainboard design for the first time,

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and cancels the fingerprint button,

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and replaces with the Face ID unlock function

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Let's take a look at the appearance of the iPhone x double-layer mainboard

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The mainboard of the early iPhone models was a long strip structure

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with soldered components on the front and back

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The iPhone X model adopts a double-layer mainboard superimposed design

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The mainboard is divided into two layers

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The upper layer has components on the front and back,

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and the lower layer is a single piece

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The upper and lower layers are welded through the middle connection point

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The advantage of this design is that it increases the internal space of the phone,

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allowing the battery capacity to be designed larger

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The disadvantage is that after the mobile phone is dropped,

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the connection point of the middle layer will be soldered empty,

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resulting in poor line contact and some failures

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There is no much difference in appearance between iPhone xs and iPhone x

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iPhone xs max is Apple's first phone with a large 6.5-inch display

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The iPhone XR uses a 6.1-inch LCD display,

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and this model uses a single camera

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In other hardware, the three models are not much different

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This series of models adopts some new technologies

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For example, the CPU of the iPhone xs adopts a 7nm production process,

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which reduces power consumption and runs faster

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iPhone xs and xs max models use OLED displays with a double-layer mainboard

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The xs and max models are Apple's first mobile phones in China

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that support dual-card dual-standby

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The iPhone XR model is a cheap machine

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This model uses an ordinary LCD screen,

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a single rear camera, and the model supports dual-card dual-standby

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iPhone x and above all have a double-layer design

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The XR is the only mainboard that continues the earlier single-layer design,

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that is, a single-layer mainboard with soldered components on both sides

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Compared with the xs, the iPhone 11 has a great improvement in hardware

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The iPhone 11 uses a 6.1-inch budget version of the display

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iPhone 11 pro is Apple's first phone with 3 rear cameras

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iPhone 11 pro and 11 pro max feature the latest XDR OLED displays

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The display effect and contrast ratio are better than OLED screen

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And for the first time,

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the U1 ultra-bandwidth wireless transmission chip has been added,

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which is more convenient and faster

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The mainboard of the 11 series also adopts a double-layer design.

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This is the introduction of iPhone x to iPhone 11 pro max