Hi! So I've had an iPod 4G for a while. It's jailbroken and everything. I love it, but the battery life sucks. I recently received a new iPhone 4 and the battery life is long-lasting! However, I really really love my lockscreen on my iPod 4 and would also like it on my iPhone 4. I don't know a way to accomplish this without jailbreaking it... If it makes a difference, on my iPod, I listen to music, play games, and surf the web. Other than using internet, I'll keep it on airplane mode (it really helps save my battery life<3). With my iPhone, I've been using it for mostly basic necessities - texting/calling, internet when iPod has no wifi, and the map. I also listen to music on it when I don't carry my iPod. so I was wondering, will jailbreaking my iPhone 4 significantly decrease battery life like it did to my iPod?