Turn on 【Find My iPhone】
Steps: Settings → Personal Information → Search → Search My iPhone → Choose 3 options
Advantages: If your phone is lost, you can log in to the iCloud official website through your computer to lock your phone, and you can send messages to your phone (I once recovered through this function)
Turn on [Optimize battery charging]
Steps: Settings→Battery battery health→Optimize battery charging
Advantages: It can slow down the charging speed of the mobile phone battery after being charged to 80%, thereby reducing heat generation and protecting battery life. Lithium batteries are not suitable for charging too fast when they are about to be fully charged, so it is necessary to turn on this function! ! ! Increase the life of the phone! ! !
Enable [iCloud backup]
Steps: Settings>→iCloud →Open the ones that need to be backed up
Advantages: Different devices can log in with the same ID, and it will back up memos and other data at the same time to prevent the loss of important files
Disadvantages: If a couple share the same ID, photos, and memos, it is easy to mess up, and even lead to breaking up (I can’t bear to look directly here…)
Enable [Camera 4K HD video recording]
Pros: You can take pictures and record videos very clearly, most people don’t know it
Disadvantages: takes up a lot of memory
Close [ios system update]
Steps: Settings→General→Software Update→Auto Update→Close
Pros: Will not download the new system inexplicably, because it will take up a lot of memory
Close [Background APP Refresh]
Steps: Settings→General background APP refresh→Close
Pros: It can reduce power consumption (turning off this function will not affect WeChat reception)
Close【Ad Tracking】
Steps: Settings→Privacy→Advertising→Restrict factory report tracking
Advantages: avoid advertisement interruption, filter useless advertisements
Close【Tap to wake up】
Steps: Settings→Accessibility→Touch→Tap to wake up
Advantages: reduce power consumption and avoid accidental touch
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Miri Wong 
Jason 
Leo-nike