"tmobile diagnostics keeps stopping" galaxy s20 pop-up

S21+ owner here. Like others, disabling the Diagnostics Metrics seemed to work for a while, but it came back with a vengeance. After coming back to this forum and seeing no solutions, I tried this:

1. Disabled all app’s permissions except "Phone" (it wouldn't let me disable "Phone").
2. Cleared the app's data (under Storage).

Since then, no more pop-ups (yet?). Good luck!
 

Debasolomon wrote:

I am shopping verizon this today.  This constant pop up saying t mobile keeps stopping has convinced me to change.  This is wasting my time.

I guess it doesn't take much to trigger you, huh? Well good riddance.

Finished with CS, there was one popup after the hard reset. I would hold off on doing that unless/until T-Mobile says that IS the fix to this problem. They said they're still working on the issue. I'll follow up later on and see how this goes. Hope this helps.

On line with CS.  Hard reset did not clear the popup problem yet... I'll update later

Same issues on my fold 3

Restore in process after hard reset.  I'll post when it's complete if the reset stopped the pop ups.

It's pretty bad if NO ONE from t mobile is answering back to any of this. And no one from there has bothered to help fix this issue. After someone has hacked T mobile this has been going on. T mobile owes us a fix  and if anyone's information is out on the web they need to protect us as the jacket said T mobile 2as easy to hack into. Who knows what they planted. 

What say you T mobile anything .... Or are you going to hide

Tried Scott's fix yesterday, worked well for about 24 hours, and now the issue has returned.

Same here on an LG V60.  Went through three chat sessions trouble shooting and one with tech support.  They 'sent' something to my phone last night but the issue popped up again.  They've ask me to do a hard reset to see if that clears.  Has anyone else tried this yet to see if it clears out.  Even with LG backup or Google backup it's a pain having to make sure everything (passwords on secured sites like banking apps) went back in.

Isn't happening on the z fold3 too