My SE in beta 3, the mobile data still in blank, no setting at beta 1, 2, 3.
Whatever I restart, reset the network setting, reset all content and settings.
The overcome is blank, in dark mode is true black.
Anyone same as me.
Also the iMeassage and FaceTime, it cannot using a phone number for communication. It may be same issue when the mobile data cannot be setting. I don't know why??
Doesn’t help you, but my SE on beta 3 shows all the details in mobile data and iMessage and FaceTime are set to use the phone number.