After installation of iOS 6 I've encountered a giant surge in data. I went from using around a gig most months, to using a whopping 5GB last billing cycle. I installed iOS 6 on June 12th, and my billing cycle begins on the 16th of every month. The previous months data used are: Jan 2012 - 1.4GB Feb 2012 - 1.2GB Mar 2012 - 0.6GB Apr 2012 - 2.6GB May 2012 - 0.7GB Jun 2012 - 1.4GB Jul 2012 - 4.7GB I haven't used FaceTime irresponsibly or used my hotspot more than usual. When I received my 90% usage notification, I contacted AT&T. The tech support lady told me the largest chunk, 1GB, was transmitted July 13th at 9pm. I looked back through my iMessages and it revealed I was packing for my upcoming move while at home on wifi. Last night I supposedly transmitted 184MB while I was asleep and on wifi. Has anyone else encountered a large surge in cellular data on iOS 6? AT&T and I are monitoring my usage. Basically whatever happens this month will be given a free ride if this goes haywire. If I transmit 184MB every 12 hours, that's 11GB in one month charging me $60 in overages!