Software Update Killer is a Cydia Tweak which will stop you from updating to iOS 5.1 or later. It does this by greying out your OTA update button within your settings application. The Tweak also takes away the update badge on your Settings app. Not only does it take it off on your Springboard, but also within the Settings app itself. We've seen similar Tweaks, but this takes away a few more features. Software Update Killer can be found in the Cydia Store under the Big Boss Repo for FREE.
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