Does restore backup mean i will reset my iphone with all the data from my previous backup on it?

I have forgotten my password and locked my iphone so it says 'iPhone is disabled connect to iTunes'. If i restore my phone will I lose everything on my phone? But if I restore backup, will I reset it with everything from my last backup on my phone?

I'm an iOS Technical Advisor for Apple

You are not going to like what I'm about to tell you but…

Your passcode is stored locally on your device. When you lock yourself out of your phone the only thing that you can do is put it into recovery mode. Recovery mode completely removes the iOS Software from the device and you pretty much just start of over.
So the good news first. If you restore the device from a backup, the phone will be reset with everything from your back up.
And now the bad news. When I say it will reset everything from I literally mean EVERYTHING. So if your passcode was on your phone at the time of the backup, your passcode will be part of your backup. So when you do the restore you are just going to put the Back up right back onto it and you are still not going to be able to get into your phone.

So, if you want to use your phone you have to set it up as a new device.

That being said, you can get around it (kinda), Import all your photos to your computer, if you use icloud all you need to do is sign back in after you do your restore and that will bring your contacts and calendars and a few other things. All of your apps and music can be redownloaded from your purchase history in iTunes.

After you do the restore, if you continue using a passcode, make sure you turn it off and back your phone up into iTunes atleast once a week, then turn it back on.