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, it works again for a day or two. Then the same happens again.
It seems that I'm not the only one with this problem (see Amazon reviews for example)
The phone was exactly what I was looking for. But if the most basic function is not reliable the phone is quite useless.
According to the phone, I have the latest software update. Are you aware of this? Is there a fix already planned?