Sorry to write here after long time, but if you google about 'How to remove dual clock' you easily go here.
I made an app to salve this problem.
Currently made for F240s on 4.4.2 (LG G Pro).
Please, if you have an imported smartphone with dual clock, send a report and I will ADD support for your smartphone too.
Dual clock Remover: https://play.google.com/store/apps/d...alclockremover