Why won't my iPhone 4s download the iOs 6 update?

I have sprint, it's an iPhone 4s
It's jailbroken
I checked my storage space and there's more than enough room.
Why won't it download? Anyone know or experiencing the same problem?

Cuz your jailbroke.

I'm not sure, but I had a jailbroken iphone 3 and was able to get the update to ios 6. I thought the update wasn't available for the iphone 3, but I was prompted for a software update and installed it and it worked. I have 2 iphone 4 that are not jailbroken and can't get either one to update. I keep getting an error message after trying to download.

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