Does erase all contents and settings on iphone?

Erase all the info off my iPhone? And make it brand new? Like out of the box
iPhone 5s

It will erase anything associated with apps, but not necessarily all your data and added apps. If you want brand new, do a factory reset. If you can't find that in the menus, switch it right off, then restart it holding down the volume+ button. That will eventually give you a system menu including factory reset. Go up and down the menu with the volume buttons and select with the power button.

Yes, that is the equivalent of restoring to factory settings

Yes
Settings > General > Reset > Erase al Contents and Settings

This option is the factory restore, it wipes the phone and allows you to start fresh as if you've just bought the phone and you'll setup the phone from scratch all the way from the Hello Screen.

The other option is Settings > General > Reset > Reset all Settings.
This option allows you to reset all the settings from the phone will saving all of your data on the phone, its not a full restore it just resets any changes you made in the settings app.

The first option I provided is your best choice for starting fresh. I always do that every 6 months to keep my phoes refreshed, then go through settings and turn off things you don't need.

Cheers
Email me if you have questions.

Jay
ï£ Apple Engineer
ACSP/ACT

Well yea…

Yes.