I love Textra, but i have issues with MMS with it, when my sister texts me a pic, it just shows a greyed out box with a picture icon with triangle with a ! in it. Or, if i try to send a pic from my moms flip phone, also att, sister is on Verizon btw. Anyways, when i tried to send a pic via my moms att phone, it popped up on my phone saying, "Textra cant retrieve MMS, chech APN settings. But if switch back to the stock messaging app, it works fine. Any ideas??