Ios 7 update? Help? Will it delete everything?

I have an iphone 5 its jail broken and I want to update it to ios 7. Will I lose everything? If so, is there something I can do so I wont lose nothing?

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IOS 7 hasn't been released yet so there are no details on if it can be upgraded "in line" or if it will have to be a wipe and restore installation. But you will lose all jailbreak enhancements and apps regardless.