The same way you'd want to back up your iPhone before updating to iOS 18, head to Settings > [your name] > iCloud > iCloud Backup and tap Back Up Now. This should take a little while, but you'll be ...
If you're selling, giving away, or even simply recycling an old iPhone, it's important to "wipe" all the data from it, restoring it to factory conditions. This way, someone else can't recover ...