I have a Moto G 3rd generation. The plan is talk & text. I have had no problems texting photos in the past, but about a month ago, the phone stopped texting photos. I also do not always receive texts anymore, either.
What phone do you have?
What plan are you on?
Does your plan include data, or just talk & text?
Hi @sarag.a4v0ao Can you tell me which app you’re using for texting? Does it have a green icon like this 
or a blue one like this 
?
Green icon
Thanks!
You should shift to Google Messages as it and Republics Anywhere are the only ones supported
To follow-up to @jben’s correct answer, the reason that app isn’t supported any more is because Google (who makes it) discontinued it several years ago and replaced it with the supported alternative, Messages. The fact that it hasn’t been updated causes a number of problems the most common one being that picture and group texting fail. Switching to Google’s Messages should solve the issue for you.
Is this ever going to be a dumb question, but how exactly do I make this switch to Google’s Messages. Thanks so much for your help.
—Sara
Here is a help article on installing Messages by Google (the article states that it is for newer phones, but the instructions should be the same for your phone):
One thing you’ll want to check is that you have disabled RCS chat features in the app (chat features are not supported and can cause issues with message delivery):
I just install it. Duh.
Thanks again for all your help. I really appreciate it.
—Sara