Hi peeps, I have a friends 3G which is on stock 3.1.3. She needs it jailbroken and unlocked at 4.2.1. Anyhow, when I used the latest redsn0w it won't recognise the 3.1.3 IPSW. I've tried downloading it from various locations and even tried the 3.1.2 as someone on google had suggested but to no avail. How else can I update it whilst preserving the baseband? I have considered updating to stock 4.2.1 and using the ipad baseband unlock, but I really can't risk losing GPS. Apart from leaving it at 3.1.3, what are my options? Thanks in advance.