I finished the migration from an iPad 3G to the iPad3 4G using iTunes. Everything worked great. I only had to re-enter my passwords for the email accounts, WiFi, and other online services credentials.
But this morning, once I was out of range of my house, the WiFi dropped and the iPad3 tried to reach my telecom 3G network. My Carrier network (Swisscom) was showing up as 3G but I kept receiving the “Could not activate cellular data network“.
1) On my initial migration from the iPad1 I used the Reset Network settings described below.
The trick is to go to the Settings \ General \ Reset tab, and to select the Reset Network Settings. This will cause the iPad3 to reboot, but then the Carrier 3G network will work.
- iPad Reset Network Settings
2) But I’m not going wipe my Network settings again and again. Only a Power-Off Power-On of the iPad currently fixes this issue. We all hope Apple will fix this with an iOS 5.1.1 release.