Hello, I have finally managed to gain access to my Dropbox account where I have managed to get my hands on a compatibility patch that we used for these devices. Assuming you now have CM11 installed, this may help matters.
Let me know your email in a Private Mail message and I can get the compatibility patch to you.
New build up lineage-14.1-20180118-UNOFFICIAL-p839v55.zip
I strongly recommend doing a fresh clean install as there has been a few background changes that may cause conflicts!
Added VoLTE (I am unable to test so don't know if it works or not)
Fixed charging LED
Fixed battery profiles & made some improvements (most battery gains will be from when the phone is idle)