My friend's iPhone 4 has a strange behavior. When on 3G, going to an IP detection website, his IP seems to be changing pretty much on every request! His phone is supposedly traveling all over the world at every http request.
It's not the carrier, because we tried to switch SIM cards and the issue is attached to the phone.
On Wi-Fi it seems to be OK.
His phone is jailbroken, however I couldn't see anything installed regarding this. But I'm no expert.
Anyone has seen this before? Is there a known application or setting that may create this? Where should he look?