BenQ M300 - Manual (Page 99)

Menus 85
4. Lastly, you must press (Save)to save all your current Alarm
settings. After completing Alarm settings, will appear in the
standby screen's status bar.
World Clock
If during travel, you move between time zones, the phone will
automatically adjust the time displayed on the screen based on the time
zone prompts provided by the local network operator so that you always
have access to accurate local time.
On
The time displayed on your phone will be reset automatically
according to the local network operator's time zone prompts.
Off
You phone will display the time you have set, and when you travel
to other time zones, the phone will ignore time zone prompts
issued by the local network operator.
Confirm First
The phone will ask for your confirmation before it resets its time.