You can use your phone’s Stopwatch feature to time an event in hours, minutes and seconds.
The event’s time can be saved, viewed, or deleted.
Warning!
Your phone must be switched on to use this function. Do not switch the
phone on when wireless phone use is prohibited or when it may cause interference
or danger.
Important:
Using the stopwatch consumes the battery and the phone's operating time
will be reduced. Be careful not to let it run in the background when performing other
operations with your phone.