My chat features haven't been working since the 2nd Jan. Did all the usual take sim out, cleared cache data on messaging app. factory reset phone In the end still didn't work. Contacted EE they sent me a new sim. Still not working. Fails to register when I turn chat features on. I sent an error report. they got back to me saying there servers were down at the time I wrote. if I still had problems to contact my network. I have it's not EE. So I'm at a loss. Also note 20 ultra and everyone I know has there's working fine.