Acer S510 - Manual (Page 54)

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3. DO be careful not to drop your smartphone or subject it to any strong impact. Do not place
your smartphone in your back pocket.
4. DO NOT expose your smartphone to extreme temperatures. For example, do not leave
your smartphone on the dashboard of a car on a hot day or when temperatures are below
freezing point. Also, keep it away from heaters and other sources of heat.
5. DO NOT use or store your smartphone in any location that is dusty, damp or wet.
6. DO use a soft, damp cloth to clean your smartphone. If the surface of the screen becomes
soiled, clean it with a soft cloth moistened with diluted window-cleaning solution.
7. DO NOT press down on the screen with force, otherwise you may crack the screen.