10x....
I did it so I watched the English menu on another phone htc 8s.
I picked up the phone system and sold it (it was my intention)
I am now the owner of Lumia 830 :)
I tried to upgrade mz HTC 8s with 8.1 DP. But after that I have some arabic language as default. Now I do not know ( it is totally incomprehensibly for me ) how to return to english.
Also I can not make a hard reset. What is my option?