@CarL!Tox: Buddy check this thread out (if you haven't already...) :

http://modmymoto.com/forums/showthread.php?t=521532

It was nearly your case, but in this case there's no issue of band allocation (I always have all 2G, 2.5G, 3G, EDGE and HSDPA working fully OK)

Greetz!

PS: if you have any ideas, post them on this thread or post link.