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.)

Not much is new, in fact I'm kinda jealous of you. You are able to do a untethered jailbreak, which is nice. If you are 6.1.3-6.1.4 then you can't… As for your question, I suggest doing what I do to make sure I keep all me pics, contacts, ect. I have an app called Dropbox (you may have heard of it) anyways I save all my pics on that (it may take awhile to save all your pics if you have a lot) and then after you update, they will be stored there without any worry. Again, if you update or not isn't that big of a deal, 6.1.3 is mostly just bug fixes

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