Unwrap not joining the torso front, back and head UV When I unwrapped the model after applying the mirror it didn't connected the head, torso and back as you can see in the image, is there any config for this to happen?  
I wanted it to look something like this so I texturize it properly ↓
Figured it out, the middle vertices (yellow) were duplicated after I applied the mirror, if anyone get the same problem, just delete them and fill the holes again ^^