Thank you. I ended up updating MMS proxy and port since I could not delete default. Creating and selecting a new APN profile keeping the default as is did not work for me.
I added the new APN profile to my OnePlus 10 pro but still get a text error message " Can't get MMS:timeout". I get the text part of the message but not the photos. Any suggestions?
Likewise, I am having MMS problems with my OnePlus 10 Pro. Have you been able to fix your problem? Changing from the original default setting to those outlined nicely by Softech did not work for me.