Regarding the unlocking - i had the same issue, desire 2 weeks old orange. Found a thread on xda mentioning an ebay unlocker - took the plunge, 30 mins 8.99!! after 3 other sites failed with database excuse! ebay item: 300434867258
I would never have dreamed of trusting an ebay unlocker, but have to eat my words, this one cheap, quick and pleasant!
I unlocked, made goldcard, ran generic rom 1.15, setup wifi, allowed update to install - all good no wifi issue.
HTC TyTn II