Half a month after the official debut of iOS 12, it ushered in the second developer preview. If users have upgraded to iOS 12 Beta, they can upgrade OTA in Settings Software Update.

Beta 2 is not a major upgrade. It does not add additional functions, but mainly fixes bugs. However, some developers found a mystery in this version, that is, the new Apple Watch. These new Apple Watches are labeled Watch4,1 Watch4,2、Watch4, 3 and Watch4, 4. In addition, they also have corresponding product models: MTUD2, MTUK2, MTX92, etc. According to the past practice, this should be the new Apple Watch.

Every September is Apple's new product launch. In addition to the three new iPhones rumored to be unveiled this year（ IPhone X, iPhone X Plus, and cheap iPhone X with LCD screen ）It is believed that the Apple Watch Series 4 will also meet users. According to the disclosure, the screen area of the new Apple Watch will increase by 15%.

In addition to the screen, the performance of the Apple Watch should also be improved. After all, when using cash, it often feels like a drag.

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