Unlocking T-mobile dongle ?

[Gixer86]

Hi just wondering if anybody knows the code to unlock a T-mobile Internet dongle.

When I've put an o2 simcard it tell's me to enter a unlock code, which I obviously don't know.

This is exactly what it says:

Sim invalidate, please enter unlock code. You can query unlock code according to the IMEI number.

I have the IMEI number if that's any help.

I know i can get it unlocked in a shop but i could do with taking it on a journey early tomorrow and want to use it on the way (before shops are open). Could i get it done at the little mobile phone accessory stands on the m/way services?

Thanks, chris.