Same problem here with s10 Verizon. Super frustrating! Been a Samsung and Verizon customer for about 10 years - thinking about jumping ship on both now...
Tagging you in here as well since I see you're a Mod that's commented on recent posts on this community. Can this issue please be addressed? There are multiple threads about this same issue throughout the community and no one is addressing it. In fact, some threads have even been archived with no resolution.
Please help, this issue has caused all MMS messaging to become basically useless since the update was pushed.
Here's links to others:
Vzw rep just sent me here! Yep, add me to the list; Unlocked Galaxy S10 on Vzw with Android 11. Sent myself a test MMS. The sent file is 404KB, the received file is 26KB. Screenshots of text are illegible.
It's disgusting that a fix hasn't been put out for this issue yet. Even more so that Samsung has failed to even acknowledge our problem and sends us to a forum. S10 unlocked with the same issue here.
Add one more to the list. My wife, Mother-in-Law and myself all have this issue. All using unlocked S10s with Verizon as a carrier. I have tried multiple SMS/MMS apps with no success. MMS compression is being applied to both incoming and outgoing MMS messages. Compression somewhere in the ballpark of 40kb and below each time. This has rendered the share image function completely useless. Prior to the update I was receiving MMS messages with 700 kb and above.
Samsung we need a fix!