I don't know about thr Sim card thing. But for an example. Stayed hotel last night, I was there about five or ten minutes I was connected to their wifi because my wifi connetion is set on automatic but there was a password you had Implement thst I never granted and when I opened my phone initially, I notice it was on a pjone nformation app that I hardly use, that tells you your network connection, etc I swiped that off and there was some android message about wifi. I turned off wifi and then I got this warning that I was getting off wifi thst I was leaving a wifi network and that I will using network data, that I never receive when I turn off wifi. I never get that and I didn't get on my phone at the hotel till that moment. And the next day when I actually tried to get on wifi it wouldn't even load up the page to be granted access to actually get on wifi to use it. I wish I had grabbed more detail about thr info on the he app. But I was freaked out it was opened in th the place and quickly swiped it off. This phone was given to me by parents as a gift, and I initially hard reset thr phone when I received it because the set up was already partially done. Now I did got to the bathroom wen I initially got to the hotel and lefty phone alone in the hotel room and I was thr only one there unless somehow someone slipped in my room and did but I have a password on my phone as well