Samsung D600

[tibboh]

Have purchased 2nd hand phone off ebay - was o2 but is unlocked. Tried to use my old orange card but it would not allow me to use photo messaging. Got new orange sim card but still having problem getting photo messaging to work, even after downloading orange's on-line help.

Can anyone give me a heads-up on all the settings i need to change over from o2 to orange (dont want the e-mail, just photo messaging)