Keep getting this message abt my son, tell me to goto settings click aon, and hit retry but there is no retry and I don't know why I am getting the error in the first place just updated yesterday

Well. It would attest appear that I'm not the only one facing this issue.

Been using Textra for over a week now and I've had no issue whatsoever. Then outta nowhere I get this mms / apn error.

Haven't seen a solution to this anywhere as of yet. Anyone ideas?

My MotoG with KitKat4.4.4 gets this msg on Textra if I also have Facebook Messenger installed. When I uninstall FBM, the MMS problem goes away.

I have been receiving this message ever since I first installed Textra. Have searched the web for solutions, tried multiple different MMS/APN settings based upon my provider - MetroPCS
To no avail. Please assist!

I figured it out! (at least for my situation) so if you're having the same problem I was here's a possible solution:
If you're sending mms to a group of iPhone users, tell them to go into message settings and select "send as sms when mms is not available" so that you can successfully group message.

As far as pictures go, go into textra settings and change the size limit to 300 or 600 and see if that helps. I had to factory reset my phone before it worked though :/

I can send mms messages but can't receive them. one group chat works but a different group chat doesn't work

can't send pictures

can't send pictures

Me too.

Mee too