upgrade advice 3g jailbroken v3.1.3(7E18)
I have a jailbroken iphone 3g v3.1.3(7E18) and it has been playing up not bringing up email and disconnecting calls before they happen. I would like to know what version peeps would recommend i upgrade to if at all (should i just try running jailbreak 3.1.3 again?). What would happen if i upgraded to the latest version itunes is offering (apart from loosing my jailbreak status) will my phone get blocked?
Is the latest version jailbroken 4.0.1?