Originally Posted by tulipkhan
And could be installed a custom rom like cygenmod etc ? Now phone has no service issue
Search the web or your carrier's site for their APN. Check it against what is in your phone Settings -> Mobile network settings -. Access Point Names -> <Carriername> Data
If it matches then it is something else, if not, then you will have to add the settings by selecting the three dot menu -> Add
Where you able to make calls before you unlocked the bootloader?
You might also search for a newer radio for your phone, I remember seeing a thread but I can not recall where it was at.
Most roms don't include the radio, it is in the firmware.