My husband and I certainly wouldn’t consider ourselves to be geniuses, but after hours of research and experimentation, we were able to jailbreak iphone 4. It started out as a bet when my cousin bought this particular phone for herself. She was looking for someone who could jailbreak it for her so she wouldn’t have to switch to a new carrier and my husband jokingly told her that him and I could unlock it. She laughed, not really believing that we could do it, and when we did, we were all quite excited and surprised.