I have an LG Voyager on the Verizon network, and I'm considering selling it. However, I won't sell it until I am 100% certain that some pictures that I took with it are totally unrecoverable. I deleted all the photos, but I'm aware that just deleting something doesn't make it impossible to recover for an expert. Is there any way to make sure that previously saved data is 100%, completely, no-doubt gone (short of destroying the physical phone and/or memory device)?