06-18-2015 08:25 AM
I am having the exact same problem. It just started doing it out of the blue. Then it said "too many pics waiting to be sent". That's crazy.
Which app are you using for MMS? I was simply attaching it to messages or sending to my email. I didn't have any additional app.
06-18-2015 08:26 AM
In my earlier comment I said I added a cleaner app that deletes cached memory, shuts down (really shuts them down) background apps, and so on. It's still working. I use Hangouts for SMS and haven't had a problem since I reported this solution in March. There just isn't enough buffer memory. I'm not sure why Hangouts works better than the native SMS app, but it does for me, and All-in-One-Toolbox keeps everything running clean.
I tried to download that app and it wouldn't for some reason.
05-23-2018 12:42 PM
I have an Unlocked Moto Z (XT1650-03) with two T-Mobile SIM cards inserted. It will not send pictures in the messages app. I’m using the stock SMS app and can’t get it to send pictures on either sim.