Thanks for your advice. I noticed the Chinese menu but I avoided it every time being afraid of not ruining something
. Anyway, these days I've found out how to flash new ROMs
so I am fooling around with trying different ROMs, I got allowance from my wife for this
). I am trying to fix an issue of the stock ROM, the proximity sensor doesn't light up the display when taking away from ear. The phone was not rooted so any attempt to enter engineering mode failed. Yesterday I discovered a MIUI ROM which looks very stylish and it solved the proximity sensor and even added the notification LED option (this was not included in the stock ROM). Now I have to test the battery life.