【情报来源】
原网址：
https://www.apple.com/ios/ios-15-preview/features/
（原始未删减的网址）
短网址：
（若原网址过长时请提供短网址，反之免提供）
【情报内容】
iOS 15 起，使用者购买新装置并透过 iCloud 备份移机时，
即便你原有的 iCloud 空间不足，仍会免费提供你移机所需的空间，
暂时扩充的空间限时三周。
Now when you buy a new device you can use iCloud Backup to move
your data to your new device, even if you’re low on storage.
iCloud will grant you as much storage as you need to complete a
temporary backup, free of charge, for up to three weeks. This
allows you to get all your apps, data, and settings onto your
device automatically.
还有内建 2FA 验证码产生器
Built-in authenticator
Generate verification codes needed for additional sign-in
security. If a site offers two-factor authentication, you can set
up verification codes under Passwords in Settings — no need to
download an additional app. Once set up, verification codes
autofill when you sign in to the site.
可停留在 iOS 14 继续更新安全性更新
Software Updates
iOS now offers a choice between two software update versions in
the Settings app. You can update to the latest version of iOS 15
as soon as it’s released for the latest features and most
complete set of security updates.
Or continue on iOS 14 and stillget important security updates
until you’re ready to upgrade to the next major version.
Universal Control 最多三台
Support for multiple devices
Universal Control works with up to three devices.