APN not saving with EE Orange UK SIM on Kitkat

I have an LG G2 rooted, running Android 4.4.2. I've put my existing EE Orange UK SIM in, and there are no APNs listed. Whenever I try and add the EE settings and then save them, the APN list remains blank. How can I add my carriers APN settings? I have tried: 1. Installing APN backup & restore app, setting as a system app in Titanium Backup and moving to the priv-app folder. Then deleting all APNs, resetting the phone. Still can't add an APN. 2. Creating a basic APN record, without all of the settings. That saves so that I can see it in APN list screen but when I update the record to include all of the settings it disappears again. 3. Looking at the apns-conf.xml file. There are loads of settings in here, but I'm not sure what this file does.