Help Unable to change network mode

[travelcat]

Android Version: Froyo 2.2
Network: Orange/T-Mobile
Taskiller Used?: no
[Optional]Are You rooted & which Rom: no
Issue:

I purchased my Desire as an unlocked phone - pretty sure it's either European or straight from Japan. Normally I'm on the US T-Mobile network.

(This may or may not be relevant but my phone is S-OFF but I don't think it's rooted; Unrevoked failed. I do have a custom recovery but the stock ROM)

Right now I'm in the UK. Now, I've used this phone on my US T-Mobile card with no problems (if outrageous fees), so I was surprised when it would mostly not get a signal. It did for a few hours once, though.

Therefore, I'm trying to swap out my SIM card so I can use my phone here but I'm still receiving "Your SIM card does not allow a connection to this network". I have tried two different networks - currently I'm working with an Orange card. After some research I saw that this could be a problem with the network mode. I tried changing the network mode in settings, but it stubbornly stays on GSM/WCDMA Auto. Next. I typed in #*#4636#*#*, clicked on Phone Information and tried to change it there. It stays on WDCMA Preferred, unless I click "unknown". All other settings are ignored.

I specifically purchased a SIM based phone for the ability to swap cards out when I travel, so this is particularly annoying. Any help appreciated.

 

[travelcat]

It's apparently the SIM that's forcing the network mode, which is moot anyway because that's not my problem.

My problem is that someone here in the UK made a mistake and entered my phone's IMEI into the country's blacklist. I know it's a mistake because this phone has never been in the UK, and was purchased through Newegg.com, a reputable company. It's not like I bought it from Ebay.

Anyway, if anyone knows the process to prove an IMEI was entered into the UK's blacklist in error, please - I need help. I've talked to four different phone companies today and only got a lot of "it's not blocked in our system" which I think is a lie, since that's what T-Mobile says yet I can't use their network.. or "someone else blocked you, we cannot help"

Any help appreciated!