iPhone 3GS upgrade to ios 4 -> No 3G Data
I updated my iPhone 3GS to ios 4 a couple days ago. At the time, I didn't notice because I was on 802.11 WiFi, but since then I haven't been able to access ANY data over cellular. I called AT&T and they stated that it is a known problem with the upgrade to ios 4 that they are currently working with Apple on. Apparently it breaks the profile on your phone so that the phone believes you are not allowed to use 3G data. It also breaks your voicemail. Calling and texting worked as usual for me, but this is not the case for everyone affected by this problem according to AT&T.
The fix they specified to me was to restore the iPhone as a new device from backup. I haven't tried it yet because I am on the way home to visit my family and writing this from the ferry, but I thought you all should know.
I don't know whether this only applies to the 3GS or not. Please comment if you know.
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