How do I back up my smartphone data?

It says to update the software on your smartphone.

And they're asking you to back up your important data, how do you back it up?

395 2016-04-05 Gentleman

When you update your software, your personal data can be blown away, so you need to back it up.
As for the backup method, the phone manufacturer provides a backup program depending on your phone.

Gentleman 9 years ago 0

A. 2

iPhone has a function to back up on iTunes.
You can watch it on iTunes.

Gentleman 9 years ago 0

Same Tag Is it possible to open Kakao Talk with the same ID as the smartphone and PC?

Same Tag What are the conditions for canceling after opening the cell phone?