This morning, my phone was very slow. It got progressively worse — finally getting to a point where there was a ten second lag between touching something and a response. I was trying to reboot because closing all of the apps didn’t do anything. The phone locked instead. And, when I woke the screen back up, I had a strange circle arrow icon in the notification bar. It turns out my phone had been downloading an OS update. It was soon ready to install, and I was actually able to use my phone again. Installed the update — that took a long while too — and voila, I’ve got Android 11 on a TCL T770B. Woohoo!