So, I finally got my iPad2 (GSM model) to work. Here's how:
- my error message was:
Your iPad could not be activated because the activation service is temporarily unavailable,"
I followed the Support web site until I got to the page about that error. I have iTunes on a Windows 7 computer, so I followed the instructions until I got to the iPad display of the connector plug with the arrow pointing to the iTunes icon. My computer displayed the form as shown, and I chose "Update".
Steps 5 and 6 of the instructions are critical. Believe them. You will probably have to be very patient and restart the whole process several times.
---------------
5. iTunes will try to reinstall iOS without erasing your data. If it takes more than 15 minutes, your iPad will exit recovery mode, and you'll need to repeat steps 2 and 3 again.
6. After the update is complete, you need to leave your iPad connected to the computer and complete the activation setup process for your iPad using iTunes. If iTunes doesn't recognize your iPad after the update is complete, disconnect your iPad and reconnect it to the computer. If it still doesn't appear, try to connect it to another computer to complete the setup process.
------------
Windows kept having to find new device drives at various stages in the update process, and iTunes or the restore process would time out, and I would have to start over at the beginning of the whole process. Must have done that about 7 times.
At one point, the restore messages on my computer did not change for 30 minutes, but suddenly, we were off and making progress again. The last "freeze" was when joining my local WiFi network. The "join" process screen froze. A power down and restart resulted in my original screen on my iPad. The whole process took over 2 hours, with all the waiting and restarts back at the beginning of the process.
Gag. What a disaster!! And, the apple support folks I talked with (about 4 over this whole time) kept saying the only thing I could do was to restore the original factory settings and start with a clean fresh iPad. They were not willing to try the sequence above. they get a ZERO for being helpful.