I have seen that the F240 have a external antena that comes or pops out of the top right side of the phone. I have the e980 at&t but with the Korean back cover in black & a korean bumper case and the bumper case has the antena opening.
I believe is for TV.
So that's hardware and software difference right there. Also the back cover of the f240 is slightly difference from the e980 apart that it looks better than the at&t the seal clip on the top right side is a few mm more to the right. So its the only part that does not allow to close and seal on the at&t.
I have to cut it and use a dremmel to remove a little bit of material to make it fit and seal properly.
The nfc and wireless charger coil is different to. So i have to swap them so my e980 will charge wirrelesly.
See pics. Funny normally in here xda dev modified the software not the actual device it looks like to much trouble but i have fun.. Lol!
Sent from my LG-E980 using xda app-developers app