My husband, having recently crossed the Rainbow Bridge, I went to T-Mobile to remove his phone from our joint cell service with T-Mobile.
They sent me home and told me to delete the phone via the T-Life app. Wouldn't work. Tech person told me to go back to T-Mobile and they did it in the store, but not until I waited a long time in line.
Came home and wanted to do a factory reset but I needed the Samsung account number which of course I didn't have.
Decided to take a hammer to it to make sure none of the contents could be accessed. A rubber mallet hardly did any damage so I took a heavy duty metal mallet and did such a thorough job that I think I fractured the battery because it smoked and hissed like crazy. By the way, the phone was quite old and really had no value.
It was great getting out my hostility and frustration with most customer service via online and phone AI support. They're a nighmore.