Where is screencast on lg g4c

[AC Question]

Ive recently had an uograde and ive got an LG G4c. Its a great phone, works fast and got a decent battery life. The problem im having is trying to cast from my ohone to my tv. Ive been told by LG that its not an option you can choose on the phone and its impossible to add it to the phones software. This cant be true. My old phone was a crappy vidafone smart 6 and that had it. Can anyone help please? Ive tried installing apps, tried chromecast, ezcast, mhl cable, the lot. I cant believe a phone this good cant cast to screen. Thanks for reading , p**sed off Neil.