Will downloading iOS7 mess up my iPhone 4?

Will downloading iOS7 mess up my iPhone 4?

It may start to go slower as Apple encourage you to buy a new iPhone, but for the next year or so, no, it should not make it go slower, and in fact, it should make it faster. My friend's old iPhone 4 ran iOS 7 really well.

Why would that happen?

  • Will the beta software mess up my iPhone 4? I wanna download the beta software so I can get iOS 7 but scared it gonna mess up my iPhone 4 will it
  • Will restoring a jailbroken iphone mess it up? My iphone was already jailbroken when i got it-i upgraded it and it got stuck in dfu mode--i got it fixed--i have a 3gs by the way and the firmware is 4.1---im afraid i might mess it up again and i was wondering if restoring it through itunes will mess it up cus cydia is in it and i don't know how to take it out…
  • Will hooking up my iPhone up to another computer mess with my music? I have the iPhone 5 and I hooked up my phone to my sisters computer because I didn't have a computer to hook it up to but now that I have a computer and I downloaded iTunes on to it will it delete my music?
  • Opinions about downloading IOS7? I have been putting off downloading IOS7 to my iphone because everyone I know who has downloaded it says its horrible.apparently it uses up loads of the battery life. Is that true? What are the pros and cons of IOS7 and what's your opinion of it? Should I download it or put it off for as long as possible?