Risks about updating software to iOS 6?

I have an iPhone 4 with 32 GB and have pereviously updated to a newer software before. Anyway, what are the risks about downloading the software? The positives?

Millions of people have done it with absolutely no problems.

My iPad told me to upgrade to it it updatd well I guess it works on the iPhone too

There are no risks if updating iOS, since it is very secure. I updated my iPod yesterday and it works fine. When you update though, you won't get youtube and you have to buy the free you tube app from the app store.

There should be no risks. However beware that google maps will be replaced by apple's own version - it is not as good. Also on my ipad the dedicated youtube app is also gone and viewing youtube through safari browser is not as good. There's a dedicated google youtube app for the iphone (not ipad) but I'm not sure how good it is

  • Would updating the software on my iPhone (4s) delete everything off it? So I just got a notification to my phone that said new software update. I clicked close because I didn't know wheather it would delete everything off my phone. But if I do update my software, will everything be deleted off of it?
  • Will updating my iPhone apps affect my phone speed as how updating the Operating System (OS) will? Currently I'm using the iPhone 5s on iOS 8.3 I know if I were to update my phone to the latest OS I may notice some slowdown on my phone's performance, since it may not have the "muscle" to handle certain functions. Many apps now are optimised for iOS 9 and/or the 6th generation phones. Will my 5s' speed performance slow down if I update my apps? Will the app's performance slow down?
  • Will there be risks and messups if I update my IPhone 4 to 6.1.3? I have an IPhone 4 and I'm super scared to update it because I'm scared something is going to screw up on my phone. My sister's phone became slow when she updated it and my parents phone's contacts switched. My worst concern is my pictures being deleted or messed up. Does anyone know if my phone will mess up at all if i update? (i got my phone in October and haven't ever update if that's important.)
  • What are the risks of jailbreaking my iPhone? Alright so I've had my phone now since Saturday and I'm already bored of not being able to have any freedom with this device. Because I have no insurance I don't want to be ruining my phone. I'm running on the latest ios 7.1.1, please can somebody give me advice on this as there's nothing on the internet anywhere else. Regards, Jordan Ellis