Thank you for the fast response! Regarding the first question: It happened a few times now but I don't think there was anything in common. There is no visual hint that the connection is gone until I want to use it. So it is difficult to say. Whatever caused it may be long ago. As soon as the problem...

I'm using the A5 now for a few weeks. I have the problem that the phone shows there is a network available. However, if I want to make a call, it says no network connection available. If I want to send an SMS, it says that it could not be sent. I also miss incoming calls. When I reboot the device, i...