367APPENDIX AMaintaining Your HandheldThis appendix provides information on the following: Proper care of your handheld Prolonging battery life Resetting your handheld Removing and installing your SIM cardCaring for your handheldYour handheld is designed to be rugged and reliable and to provide years oftrouble-free service. Please observe the following general tips when using yourhandheld: Take care not to scratch the screen of your handheld. Keep the screen clean.When working with your handheld, use the supplied stylus or plastic-tippedpens intended for use with a touch-sensitive screen. Never use an actual pen orpencil or other sharp object on the surface of the handheld screen. Your handheld is not waterproof and should not be exposed to rain or moisture.Under extreme conditions, water may enter the circuitry through the frontpanel buttons. In general, treat your handheld as you would a pocket calculatoror other small electronic instrument. Take care not to drop your handheld or subject it to any strong impact. Do notcarry your handheld in your back pocket: if you sit on it, you may damage it. Protect your handheld from temperature extremes. For example, do not leaveyour handheld on the dashboard of a car on a hot day or on a day whentemperatures are below freezing, and keep it away from heaters and other heatsources. Do not store or use your handheld in any location that is extremely dusty, damp,or wet. Use a soft, damp cloth to clean your handheld. If the surface of the handheldscreen becomes soiled, clean it with a soft cloth moistened with a dilutedwindow-cleaning solution.
