Will getting an iPhone update delete all of my stuff if I don't sync it?

I have an iPhone 5S and I'm still on IOS 7.1.2 and I really need to update it. I would sync it to be safe but my laptops dead and I've lost the charger. Can I still update it without it deleting all of my stuff?

It shouldn't delete anything. It's just updating the os software mostly

Updates don't usually delete anything, however there's a slight chance of something going wrong that could result in a restore to fix it. Therefore it's always best to do a backup either via iTunes or iCloud before an update. It isn't mandatory but it's best to be safe than sorry

You could get the update through the phone itself & no nothing would be deleted but should get a charger at the very least & plug it in prior to starting the update.

Yes a backup would be safer as well but it is not absolutely necessary.

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