Advice on using M3100 on O2 Germany

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I have an Orange m3100 with a O2 Germany USIM. GSM seems to work fine, except that I don't get o2's "home-zone" indicator.

3G doesn't seem to work however. Sometimes (very rarely) I get the 3G symbol for a few seconds and then it disappears. I'm sure it is not a coverage problem as my friends get service fine.

I don't want to flash the whole ROM to an O2 germany setting I'd prefer a UK language version, and anyway, the keyboards are different.

So maybe adding some of the o2 extended CABs will work, but I'm not sure.

Any advice on this?

Richard

Not sure if this is releated however I had a problem with using an O2 sim (2G) on my unlocked M3100 see http://forum.xda-developers.com/showthread.php?t=278206

Any way it's now been about 4 days and I have had an continous network coverage after upgrading the Radio Rom to 1.16.00.00

I added the o2 exended cabs to my ROM and that gave me the home-zone indicator. After some investigation, I found that the reason I had no UMTS was because they forgot to enable it in the shop. Easy fixed from the portal. Oddly, I did intermittently get UMTS service (for a few seconds), which implies some bug somewhere.

I am with I-mate Rom (English one) no problems at all, I have all the time the U symbol (UMTS for 3G), I did something and now I doesn't have the home sign but I have to see what I have changed, but normally it works