I bought two N9 phones from China for Xmas. They were supposed to be "original" and unlocked.

One phone has firmware Pr 1.3 (40.2012.21-3.249.1_PR_249)
This has Vodafone splash screen and my SIM doesn't work in it.

The other phone has firmware PR 1.3 (40.2012.21-3_PR_003)
and has Chinese programs. Yet, I can use my SIM card in this one.

Can I flash them with a global or latin american firmware?
Will flashing remove the Vodafone problem?