Up date apple software as and when new releases
Up date my iPhone
iPhone 12, iOS 14
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https://support.apple.com/HT204204 Update your iPhone, iPad, or iPod touch
Customize Automatic Updates
With iOS 12 or later, or iPadOS, you can have your device update automatically overnight while it's charging. To turn on automatic updates, go to Settings > General > Software Update > Customize Automatic Updates, then turn on Install iOS Updates. Your device will automatically update to the latest version of iOS or iPadOS. Some updates might need to be installed manually.