yes it is possible i too did this in my early days with a 3210. try to unlock it with the same software, if that dont work ull have to get dejan leads to do it with or take it to ur locker mobile unlocker.
i did exactly the same thing with my 8210 and a data cable, didnt make a diff what type of software i used to try unlock it, so had to take it to a shop to get it done they just flashed it.