Basically EE aren't interested that VOIP phones do not work. I have a softphone and a deskphone on my own cloud hosted server. These both worked perfectly over EE 5gee (landline BB too poor here) up to about a fortnight ago, using a IP v4 only APN setting. When they stopped working I noticed that the IP address being issued from EE had changed to a totally different range (31.x.x.x) - the phones still rang but there was no speech path; however if i conected my desktop PC to my VPN the softphone worked pefectly, proving it was ports being blocked by EE. After a very long convesation with EE faults yesterday, with me explaining that i needed ports 6000-40000 UDP for my speech paths, they stated that they could no longer provide this. I explained that, in that case, it was not fit for purpose and that they should let me out of contract early, so i could move to o2 or similar where my VOIP phones will work. They agreed to end my contract early. o2 here I come.
