So I've been searching around and haven't been able to find an answer yet, that actually works. I'm using my G3 on Sprint for a bit while my G6 gets fixed, and it's on rooted ZVC. I apparently live in a Sprint dead zone, so WiFi calling is a must, but MMS doesn't work over WiFi with the default APN setting for MMSC. If I use an app like Textra, I can force the correct URL, but I have been unable to change/add the correct APN to the system in order to use Android Messaging, for example. I can get to the APN settings screen, but no options to add or edit. ##DATA# lets me change the setting for the stock messaging app only. Any suggestions?
