I've done all the same steps over a number of years. One more item I'd add is that mbasic.facebook.com still allows you to get messages. For no valid technical

I've done all the same steps over a number of years. One more item I'd add is that mbasic.facebook.com still allows you to get messages. For no valid technical reason I'm aware of, they removed the ability to view messages in the standard mobile site. It used to work, and frankly it worked really well. But I'm sure the engagement and quantity of data they sucked up were orders of magnitude better with Facebook Messenger.