I recently tried textra, it wouldnt allow my stock SMS app work anymore (to include mms) and it wouldn't send mms from textra, apparently there is a spot in textra where I had to enter my APN settings as well not just in the APN spot in the phone. Good luck.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?