Will everything delete if i upgrade to ios 7? - 1

I'm excited for the update! I have been waiting but will all my game data pictures etc.delete i really don't want that to happen.that's what i heard do i really have to backup my iphone? And some of my games weren't apparently saved to icloud so if they get deleted it won't save. Is there a way to save the my game data because i think i didn't have it icloud on at the time i downloaded my other games and stuff.

Added (1). Well, smart *** i didn't chose the category. The website choosed it auto for me.

Wrong category - this a computers category - an iphone category.

  • Will updating to iOS 7 delete everything if I don't backup my storage to iCloud? I have about 4.8GB left of storage in my iPhone 5 left but iCloud is acting up and it's saying there's no space to back everything up. What should I do? Should I still update to iOS7? It's stressing me out and I don't wanna risk anything being deleted.
  • Will updating to ios 6.1 delete everything? I wanna update my iphone 4s to ios 6.1 and i wanna update it from my phone does it delete my apps? I don't have any backup for my apps.
  • Will updating from ios 6.0.1 to ios 6.1.2 remove everything? I know that if you 'Majorly' update your iPhone it will erase everything from your iPhone like updating ios 4 to ios 6, but what if you are just updating your iPhone from ios 6.0.1 to ios 6.1.2 on the same version, is there any difference or it will also remove everything?
  • Will IOS 7 upgrade delete my entire reading list in safari? So i have an old iphone 4 that still works but is not updated. It is in IOS 6 and i'm thinking about upgrading it to IOS 7 but i have a lot of important stuff saved in my reading list. If i upgrade, will it delete the entire reading list? And If it does and i need to back it up on itunes, is there any other way to back it up in a different place?