Unlocked iPhone 4 Carrier Support File Issue after iOS 5.0 Upgrade

Apple Gurus,

Hoping that you can help with the following situation. I purchased a fully unlocked iPhone4 from the US Apple Store and have been using it while I travel on a myriad of GSM networks thus far without any issue.

I upgraded to iTunes 10.5 two days with no issue and was able to check for updates with it reporting no updates were available then when iOS 5 was released it reported that this update was available. All well and fine. I upgraded to iOS5 successfully without error or issue but since then iTunes will not check for an update, or checks but returns an error as follows:-

"iTunes could not check for an update to the carrier settings for your iPhone. An unknown error occurred (1630). Make sure your network settings are correct and your network connection is active, or try again later."

I have never received this error before and from my research - of which there seems to be SO much on the net - I believe my issue is as follows:-

- The carrier I am currently using does not sell iPhones and as such does not have a carrier file logded with Apple. The lookup for my carrier is therefore then failing. If this is the case I have no issue up to this point. iTunes though seems to take this as a critical stop point instead of an informational prompt and halts the update check process. I believe iTunes should advise of the missing info and move on as I have entered any relevant info (APN etc.) manually and all services work fine on my iPhone4.

The root of my concern is that one day in the next few months, when an update to iOS5 is released, I will not be able to update due to this faux pas by the iTunes developers.

Can anyone help or advise how I can proceed to resolve the situation? I really do not wish to be generating ipcc files etc. or applying patches/fixes etc. as I would like to maintain my iPhone4 in an unaltered state as much as I possibly can.

Hope you can help

dre_apple