Suddenly my Fairphone no longer works. All applications (including Firefox) crash, almost always during the calls the screen goes black and back to work only by pressing the on/off button for several seconds .
If you restart the phone, it spends several minutes before working.
The keyboard does not respond to commands, as well as the screen .
What can I do? Is there a solution or do I throw it up? It has only 1 year and a half , it is a Fairphone 1U, it never fells and was always held up very well .
I have kaspersky as antivirus .
Thanks for your help and sorry for my English.