My edit button disappeared on my iphone4?

Help! When i go into camera roll, there's usually a edit button on the top right of the screen, where i can use it to delete a bunch of pictures, but it was disappeared now for the last like 2 months! My iphone is updated and i have tried syncing it to my computer but that doesn't work.

You might have to reset it. If you have synced it and saved it on your computer, wipe it out and restore it.

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