What will happen when i restore my iphone?

Well for some reason i need to restore it then before its restoring there something that says "itunes is downloading software for this Iphone and will restore and will restore your iphone when the download is complete" what does it mean its doing? When i restore it will it erase anything? Help! I don't want it deleting anything. I don't know last time i downloading music it said something about backing up then it was syncing music

I think it resets your whole iPhone, deletes your music, apps and everything. Quickly press cancel if there's a button.

  • When you restore an iphone from itunes backup does it restore messages? I need to restore my iPhone 4S in iTunes, will I lose my messages or will it leave the messages from my most recent back up?
  • What will happen if I restore my jailbroken (unthederd) iPhone 4S? I have an unthethered jailbrake on my iPhone 4S and someone told me if I restore my phone the jail brake will go away but all the stuff on my phone will not this includes tweaks I've made to the phone with the jailbrake and all my data (music, contacts etc) is this true. If not, is it possible to get rid of the jailbrake and keep all your stuff
  • What will happen if i restore my iPhone to original settings? Every time i hook my iphone up to itunes it says i need to restore it to original settting but will i lose my photos and other stuff? My bad it is factory settings
  • What will happen if I restore my iPhone 4? I just got an iPhone 4 yesterday, and I forgot the passcode. My mom said that I could restore the iPhone 4. That will delete completely everything right? Well luckily i didn't have any information on the iPhone. But will it still be in the same carrier? I have it on att. Will it be unactivated? Or will it still be in att?