Mobile network sign disappears, replaced by "stop sign" icon I am using Samsung Galaxy Note 10.1 N8000 device. I have SIM card inserted for mobile data usage. First time, it is working as I captured status bar image as shown with mobile data sign :-



but after some time, mobile data sign disappears and "stop" sign appeared as shown in the picture :-



What does that stop sign mean?
The icon will appear when your mobile provider network is down. No signal at all, so SIM appears as out of service.



(Image courtesy of Android Central's Forum)