I have a new iPhone 7 that has given me the No SIM Card Installed message 3 or 4 times now. The first time, the message went away when I power cycled the phone. This worked once or twice. The next time, I ejected the SIM after powering off/on didn't work. This last time, powering off/on did not work so I ejected the SIM again. Is this normal? EDIT - Is this an issue with the phone or the SIM? I have not even used the iPhone 7 except for a few minutes here and there to set up options, etc. It has otherwise sat on a table. I have handled it for less than an hour since I bought it in the middle of February. The phone is gift for an elderly relative so I don't want her to have to eject the SIM all the time. I bought an iPhone 7 Plus the same day as the iPhone 7 and have never encountered this message.