I have successfully managed to unlock a T68i phone using multiserve credit putchased from FoneFunShop however I have tried twice to de-brand the phone and both times I have received the same error:
Flashing ARM
Error 0x002508

This was a test run before doing the same to a T610. This I will not be doing until some light has been thrown on the above.

I have mailed the information below + saved files to reportfiles@*****.com and as yet not had a reply, 30 hours has lapsed since the mail was sent.

Phone info:
Make Sony Ericsson
Model T68i
Previous SP Orange
Country UK
Windows XP SP2 (FW OFF)
System Model Dell Dimension 3000
Processor x86 Family 15 Model 4 Stepping 1 GenuineIntel ~2660 Mhz
Total Physical Memory 1,024.00 MB
Available Physical Memory 534.07 MB

And yes the phone is fully charged.