Just got my iPhone sim-free. Currently with AT&T no contract for a long time. I simply took my sim out of my current iPhone X into the new iPhone Xs Max (hasn't been turned on). THEN turned it on, worked like a charm. Assuming I did the steps right with me putting in the sim BEFORE turning it on, will I get hit with an activation fee? Furthermore, will there be any other fee's involved or do I have to do something on the AT&T account to let them know I have a new phone now? Also, anyone else found it weird that you have to insert the sim upside-down? Threw me for a loop and thought I had a defective sim tray for a second.