How to upgrade your iPhone software
There are several ways to upgrade your iPhone software. The easiest way is to set it up automatically so that it updates automatically overnight when your device is charging. However, if you want to see your own download pattern updated, we’ve outlined two ways you can upgrade. One is the wireless way through your iPhone and the other is to upgrade using a Mac computer.
It is important to back up your own data before describing the process.
Update your iPhone wirelessly
Connect your iPhone to the charger. Make sure your Wi-Fi connection is strong and secure. Note that this requires Wi-Fi and cannot be done via a mobile data connection
On your iPhone you go to settings.
Tap after General.
Then tap Software Update.
If a new update is visible here, its details and changelog are also visible there. Click on the download and install options to update. Now the download will start here.
Once downloaded, tap Install Now. You can complete the installation process later by clicking Next with this option, for which you will get the Install Tonight or Remind Later option.
The iPhone may ask you for a passcode / password / fingerprint before starting the installation process. Your iPhone will reboot after the installation process is complete.
If your iPhone has iOS 12 or later, the iPhone automatically updates overnight while charging. To enable automatic updates, follow these steps:
After customizing Settings> General> Software updates> Automatic updates, install iOS updates. There are still some updates that are installed manually after this option is turned on.
Update your iPhone using your computer
If the wireless system doesn’t work for you, you can try updating using a computer. You will need a Wi-Fi or Ethernet network before you can update.
Connect your iPhone or iPad to your computer via charging cable. On a Mac running MacOS Catalina 10.15, open the Finder. Open iTunes on a PC running MacOS Mozaveve 10.14 or earlier or on a Mac.
After the phone loads, click Check for Updates under General or Settings.
Now download and click update.
If you are asked for a passcode, enter it. Follow the on-screen instructions to complete the next process.