O2 tech support say settings 'disturbed' by unlocking

[d146895x]

Got an unlocked (was on O2) BB 9000. With various SIMS it performs as a phone, no problem (not using BIS). When I install the SIM (O2 contract) from my 9700, despite having a good signal, cannot make calls or send texts. O2 have looked at the phone and said - when the phone was unlocked, it disturbed some settings and there is nothing they can do.
This sounds like BS to me. The 9000 was unlocked via a code. It has the standard (v4.6) O2 operating system.
Any thoughts?

[ezrunner]

Wirelessly posted (well lookie here!)

I think they are not being quite honest with you. Just an easy way to be done with you

[dc/dc]

Unlocking does not disturb settings. Period.

[fonejunkie]

Unlocking does not disturb settings. Period.

I agree. I have unlocked every cell phone I have ever had from simple LG "dumb" phones, Motorolas, Nokias, BlackBerrys... none have ever shown any problem or inability to function because they were unlocked.

[rambo47]

The unlocking may have dislodged the frasistam from the marjoram. I hear it's particularly common with O2 BlackBerrys.

2 words for what O2 is telling you: Bull. Shit.