I'm fairly new to ROMs and what makes things work but I'm having an issue with hangouts on certain ROMs. I've flashed a few different ROMs and on most Hangouts works but won't allow group messaging or allow me to enter or save apns. It also doesn't even show the group messaging option in settings. SMS and even MMS will work but if I try a group message it just sends SMS to individual people. I've had group messaging work on other ROMs with same gapps and everything so I guess my question is what controls hangouts ability to allow group messaging? Is it involved in the apnconf.xml or something else? I've tried replacing apnconf.xml with one that allowed LTE and working group messaging in other ROMs but no dice. Not really sure what to look for so any help would be appreciated, thanks.