The iOS 10 series developer beta system has always been updated frequently. The latest version has been updated to iOS 10.3 Beta 1. The upgrade package for iPhone 7 Plus is up to 2.01GB, which is a complete upgrade package. Apple's upgrade page does not explain what changes it has made like the official system.

In the setting menu, the management interface for Apple ID is strengthened. After opening this setting, it includes unified account management for iCloud, iTunes Store and App Store, and supports the management of all devices using this account.

In addition, CarPlay also has enhanced functions. The shortcut of the recently launched application can be displayed, and the map application can also display the position of the electric vehicle charging pile.

For users with AirPods, iOS 10.3 also adds the search function of AirPods. However, there are not many users of this headset, so this upgrade is not of great use to most people.

The most practical upgrade of iOS 10.3 is to finally upgrade the entire file system to Apple File System (APFS). Apple officially announced the new file system APFS on WWDC2016. It has many advantages, optimized flash/SSD storage, and increased encryption functions. The core of this system is the encryption function. Apple will provide a unified encryption method for each of its devices to upgrade this system. Another advantage is that after using APFS, the space occupied by the system becomes smaller. Therefore, after upgrading the system, users will find that the usable capacity increases by 1G or even up to 3G. This is a good news for users with 16G capacity.

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