Zte A139+ User Manual page 39

effect and vibration in Game Setting.
Stopwatch
You can measure time and take split times or lap times, for example, in different
sports.
Themes
Select a theme for the menus interface.
Calculator
Press 0-9 Number keys to input numbers, and press the # key to input the decimal
point.
Press the Up/Down/Left/Right keys to switch among different operators.
Press the Right soft key to clear last digit or results. Press the End key to exit the
calculator. Press the Left soft key [OK] to get results.
Note: This calculator has limited accuracy and rounding errors may occur
especially in long division.
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