I'm on an iPhone 4 5.1.1 jailbroken with Absinthe, running on AT&T. My 3G service has been very slow (and often it won't even load) which is odd because it's worked pretty well so far and I've been jailbroken many times before and never has this been an issue. I'm also in a major city so the coverage is consistent. This has been going on for days and nobody else has had this issue. I've contacted AT&T - no outages etc. Rebooted a dozen times, reset the network setting, no dice. Could the jailbreak be causing this?