Job well done, Scamsung. The A5, which I use as a test device, has been losing its connection to the SIM card that has been inside the device all the time while I have been actively using the device. It just locked the phone and claimed that "can't find the SIM card". I have been able to recover from this situation by entering the PIN code and opening the phone again, but yesterday evening the phone started rejecting the valid PIN code and locked the SIM card.
And then there are people who wonder why I hate Android devices.