just got 1 DHD from ebay (with AT&T logo) but it seems to not work on 3G networks in my country.(Albania).
the 3G operator is working on 2100 MHz but phone seems to get only Edge.
just did uprade it to the last official ROM. 3.12.405.1
baseband : 18.104.22.168U_26.14.02.28_M.
Even tried to change the radio version to some different ones found on this forum but no success.
any help is needed urgently as if there is no 3G connection im going to send it back to seller.