How to get rid of update sound?

I have a jailbroken iPhone 4s and if I go into my setting it says I have an update I need to install but I can't because it's jailbroken and it just says error. It makes an annoying ping sound about once every 20 min. If you could tell me how to install an update with a jailbreak that would be great, but if not I just need to know how to turn off that annoying sound!

You can't upgrade a jail-broken iDevice. It will break the jailbreak. As for the sound, try resetting your iPhone. Press and hold the lock and home button for about 30 seconds.

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