I regularly lose my internet connection. I can get it back by rebooting the phone or going into Flight Mode and back.I have a suspicion that it might be related to me not having the latest carrier profile.I have Swisscom 9.0. Is there a 9.1? If so, how do I force-install it?Facts: - iPhone 4 model A1332 EMC 380A / MC603F / version 4.2.1 (8C148)- Carrier profile: Swisscom 9.0- it has been like this since I opened my account in Nov 2010, but only with the Swisscom SIM- I can make it work again by switching to flight mode and back- Wi-fi always works- I bought the iPhone unlocked from the Zurich Apple Store- I have used the same iPhone 4 with Danish TDC and 3DK without losing the internet connection (as late as this weekend with 3.DK)What I’ve tried: - Upgraded to the latest iOS version, does not fix it- Restored iOS and restored my backup, does not fix it- Restored iOS and NOT restored my personal backup (making the iPhone exactly as it came), does not fix it- Reset network settings from Preferences > general > reset > network- Deleted (user)/Library/iTunes folder- Deleted (HD)/Library/iTunes folder- Updating to the latest iTunes- Switching to Edge-only mode- Syncing and restoring with another Mac, with a new user account