MMS not sending

[SarahD]

I cant seem to send MMS messages from my IPhone 12 to another phone. 
I get ‘message sending failed’ this happens no matter the photo size etc 

Never had a problem before just recently. 

MMS is enabled on my phone. 

I am attempting to send to a phone not using WiFi or 4G. 

[Paddiewack]

Then I’m sorry that I can’t be more helpful.