I got the iphone X tmobile version. I asked here before that I need to take out the included sim card and put my own card in before turn on the phone. But as I was putting the phone back into the case and it turned on, I think the side button somehow got pressed. When I saw the apple logo I immediately took a pin and pop out the sim tray, then the language list appears. I put my own sim card in, reboot the phone and continue setting up. It went to activation and then showed me a page that ask me to call Tmobile to complete my activation. I didn't call but continue the following process and set up as a new phone. Now I have tried calling other number and it went through. And other number can call me too. But the Call Tmobile page still confuses me. Is the activation successful? Maybe it's just a page that appear only when it's not an unlocked phone. Can someone clear this out? Thanks.