Hi, I upgraded my iphone 4 to iso 5 beta 6, but now it shows "No Service" at top left, and unable to complete your activation. Also tels that this device is not registered as part of the iphone developer programme. How could I fix this problem? Please..?

Hi, I upgraded my iphone 4 (4.3.3) to iso 5 beta 6, but now it shows "No Service" at top left, and unable to complete your activation. Also tells that "this device is not registered as part of the iphone developer programme." How could I fix this problem? Please help me...,

I had a similar occurrence with my just activated iPhone 4.
I had been using the phone for three days when an odd occurrence with voice mail caused me to call tech support. After some discussion they decided to push the activation to my phone (even though I had been using it for three days). When I went to power it back up again I repeatedly got the "no service" notification. I got tech support on a land line and we tried hard reboots and so on. No joy. They told me to take it in to the point of sale and either the SIM card or the phone needed (or both) needed replacing.
I tried one last hard reboot after dinner and the phone came up with service, but I took it in to the point of sale in the morning and they swapped the SIM card out and I went to a Genius Bar appointment to get the phone checked out. It is supposedly OK, but I am still having some problems when syncing it so I will have to visit the Genius Bar again tomorrow about that. At least I have not experienced the "no service" problem in the roughly 24 hours since the SIM card was replaced. (Fingers crossed)

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