Thanks Meter 31
Join Date: Jan 2008
Location: Zagreb, Croatia
First FIND OUT what exactly is your original ROM version (or try to update it via HTC update page).
Then flash newer radio and install adequate rilphone.
If that doesn't help, flash latest Orange ROM from the link I supplied.
If that helps, welcome to custom ROM flashing...
Oh, and unlocking should not cause such kind of problems.
In space no one can hear you scream.
Samsung GT-I9100 (SGS2)
: stock JB 4.1.2 (LSD/LS1/LSC)
HTC Blackstone (Touch HD) - 2nd SIM
ROM: HSPL 1.56
+ EnergyROM Jul.04 21916 Cookie 2.0
Radio & Rilphone: 1.17.25.09 + 22.214.171.124