Why does Apple display only half the information after the upgrade?

Because it is a system compatibility problem. After the upgrade of Apple's system, only half of the information displayed is caused by system compatibility problems. Please restart the Apple phone. IOS is a mobile operating system developed by Apple. Apple announced this system for the first time at Macworld conference on June 9, 2007. It was originally designed for iPhone, and later applied to iPodtouch and iPad. IOS, like apple's macOS, belongs to a commercial operating system similar to Unix. Originally this system was called iPhoneOS. Because iPad, iPhone and iPodtouch all use iPhoneOS, it was announced at the Apple Global Developers Conference on 20 10 that it was renamed as iOS(iOS is a registered trademark of Cisco's network device operating system, and Apple's renaming has been authorized by Cisco).