Hi I know I have used a beta software, so should not be complaining, but... Mine is a O2 UK unlocked iPhone which i use in India on Vodafone. I have never got the "cellular data network" option to edit apn- don't know why but I used Apple config utility to create a profile for my network which allowed me to access internet using Vodafone's APN. Interestingly, I cannot see cellular data network option only when I use SIM card of a official carrier; inserting any other SIM brings the option back..but that's another story... Now, after the update to 4.0, the apn settings have simply stopped working and I get a "Could not activate cellular data connection" error inspite of creating the profile again and storing it again. Leaves me with an iPhone without internet which I cannot downgrade as well Has someone else faced this? Any solution folks?