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After pulling my hair out for two days trying to get the data service on my iPhone back up and running, thought I'd post my fix. I found a few threads with similar problems, but no posted solutions.
My 3G internet service wasn't working. Voice service worked perfectly. Screen showed full 3G signal strength. Apps which required an online connection could not connect. Mail could not connect to mail servers. But when I connected via WiFi, everything worked perfectly.
Rebooted the phone. Reset Network Settings. Did a full restore via iTunes and reinstalled all my apps. All the usual troubleshooting steps. Fiddled with it for two days and still wouldn't work.
Here's what did: Settings > General > Network > Disable 3G. Went back to the home screen. Signal strength briefly drops and then reappears without the 3G symbol next to it. Settings > General > Network > Enable 3G. Went back to home screen again. 3G symbol reappears a moment later. Works great ever since.
Somehow turning the 3G switch on and off resets something that isn't reset by rebooting the phone or even a full system restore.
Hope this helps someone else with the same problem...
My 3G internet service wasn't working. Voice service worked perfectly. Screen showed full 3G signal strength. Apps which required an online connection could not connect. Mail could not connect to mail servers. But when I connected via WiFi, everything worked perfectly.
Rebooted the phone. Reset Network Settings. Did a full restore via iTunes and reinstalled all my apps. All the usual troubleshooting steps. Fiddled with it for two days and still wouldn't work.
Here's what did: Settings > General > Network > Disable 3G. Went back to the home screen. Signal strength briefly drops and then reappears without the 3G symbol next to it. Settings > General > Network > Enable 3G. Went back to home screen again. 3G symbol reappears a moment later. Works great ever since.
Somehow turning the 3G switch on and off resets something that isn't reset by rebooting the phone or even a full system restore.
Hope this helps someone else with the same problem...