My mobile phone was swithced on, and yet when my brother sitting in the same room with me tried to call it, we got the message that the number is switched off!
Also, when i tried making a call with my phone, it would try to dial the number for a few seconds before giving a beep beep sound and disconnecting. In fact it felt like it gave up connecting straight away.
I swithced off my mobile and started it again and the issue was gone. However, does anyone know the cause of this?