58CalculatorThe calculator in your phone provides basic arithmetic and trigonometric functions;calculates the square, the square root, and the inverse of a number; and convertscurrency values.This calculator has limited accuracy and is designed for simple calculations.Select Menu > Fun & Apps > Organizer > Calculator. When 0 is displayed on the screen,enter the first number in the calculation. Press # for a decimal point. Press * foradditional functions. Scroll to, and select, the desired operation or function. Enter thesecond number. Repeat this sequence as many times as it is necessary. To start a newcalculation, first select and hold Clear.Countdown timerTo start the countdown timer, select Menu > Fun & Apps > Organizer > Countd.timer > Normal timer, enter the alarm time, and write a note text that is displayedwhen the time expires. To start the countdown timer, select Start. To change thecountdown time, select Change time. To stop the timer, select Stop timer.To have an interval timer with up to 10 intervals started, first enter the intervals.Select Menu > Fun & Apps > Organizer > Countd. timer > Interval timer. To startthe timer, select Start timer > Start.To continue to next interval period automatically, select Contin. to next period >Automatic or, if you want to confirm each interval, select Confirm first.StopwatchYou can measure time, take intermediate times, or take lap times using the stopwatch.During timing, the other functions of the phone can be used. To set the stopwatchtiming in the background, press the end key.Using the stopwatch or allowing it to run in the background when using otherfeatures increases the demand on battery power and reduces the battery life.