When I try to send a SMS with a picture attached I receive a message saying that the message could not be sent due to network problems and the message is tagged with the note "Send Failed".
I verified the APN settings and they seem to be correct. I have access to the internet and messaging without picture attachement works.
I am using a Huwei Honor 8 phone.
@Ingo I know it may sound odd, but try another texting app from the Play Store. Sometimes the default one goes wonky for no obvious reason, and using a different app helps.
For starters, I'd try out Google's latest, Android Messages. It's free and quite good. Or, feel free to try out a 3rd party app. I presonally like and recommend Textra, but Chomp is also very popular. Both are very highly configurable and feature-packed. I think they give you a free trial and then after a while you either have to put up with ads or purchase the premium to get rid of them. I personally feel Textra is worth every penny, but you could at least give one of them a whirl. Or just Andorid Messages is fine too!
Please let us know if that changes anything for your problem.
Thanks for the sound advise. However I was able to trace the problem to a typo in the APN name. Instead of having the APN name "sp.mb.com" the auto-correct feature had changed the APN name to "Sp.mb.com". It appears that this typo did not interfere with regular data/internet and SMS tasks. However it did interfere with sending an MMS with picture. Once I changed the capital "S" to a lower case "s", MMS worked.
Again thank you very much for help and suggestion.