enabling VoLTE yourself
Since I'm impatient I decided it would be the best course of action to enable VoLTE myself.
For those who have root, you can basicially follow this guide:
P.S If you have trouble etc. refer to the thread on XDA. In my case VoLTE never worked only Wi-Fi calling, probably due to borked configuration file and since I didnt really feel like doing a reflash, i fixed it myself via qualcomms diag.
Keep in mind, if something goes south you can brick your device, so be warned.