I'm from Thailand and I brought a used blackberry 8320 curve. However, I can't register on BIS service of my country because they said someone already registered this imei. I want to un-register BIS service provider and I found this forum Un-register from Cingular BIS web
But the problem is I don't which service provider my phone is. I guess it's orange because I saw orange logo when I turn on, is it?
How can I contact orange service provider?