Good news! You have the 10 apps that could be the culprit! (probably -- assuming you didn't update more than those 10).
Your two choices are:
1) uninstall those 10 apps at the same time and see if it stops - then reinstall one by one and see which is causing it, or
b) uninstall each app one by one until the error goes away to find the culprit.
That's the consensus of the interwebs. It's an app conflicting with one of the Samsung built-in apps.
Unfortunately, I just uninstalled all of those apps (with exception of TMobile and Google Text to Speech, those just reverted to original versions), then rebooted, and error still came back. I cleared cache again, and still same issue.
Any other suggestions?
It was working until you updated apps. You may have updated something you didn't realize (10 is a large number for "a few").
Essentially, what I'm telling you is you either need to uninstall until you find the culprit, or factory reset and install until you find the culprit.
It's an app that's conflicting for some reason.
My experience has been the same. T-mobile associates have tried multiple things. I have Factory Reset, booted in Safe Mode, Cleared Cache, reset APN settings, replaced my SIM card, and put my sim in a friends phone which promptly displayed the same message, "Unfortunately, IMS Service has stopped". I am at my wits end and don't have the money to buy a new $1000 phone (which OF COURSE they suggested). Also, my phone is fully charged.