Hi, I'm new to macrumors. I have an iphone 3gs with firmware 4.3.1 not jailbroken, and I was wondering if updating my phone to 4.3.5 changes anything besides the security, or adds anything. I searched the forums and saw that it was 666mb and takes a while to download/install, and also that the battery meter changes? What are you opinions on updating to 4.3.5? If you have it, is it faster? or should I stay with 4.3.1? Thanks in advance.