Hello Friends

I´m writing from Curitiba, Brazil. I bought on e-bay a BB 7290 (seller said it was unlocked) and BB doesn´t recognize any network in Brazil.
I was reading the forum, then I made the test with SIM card (mepd):
ID: 21 number:
SIM: Disable
Network: Inactive
Network Subset: Disable
Service Provider: Disable
Corporate: Disable

At options>network - I scan for available network and it just found "Emergency Service Only".

Aplications show me 4.1 foe system software.

How can I find the way to make it works here in Brazil, for TIM carrier.