Maxcom MM821 User Manual page 44

• Ensure mobile phone avoid damp. Liquid may cause
erosion of circuit. If your phone is damp, please take out the
battery first, and then dry the mobile phone and replace the
battery.
• Please don't place the mobile phone to dirty or dusty
environment; otherwise the components may be damaged.
• Please keep the mobile phone away from high temperature.
High temperature may shorten the using time, damage the
battery and distort or melt plastic components.
• Please keep the mobile phone away from low temperature.
The circuit may be damaged by the sharp change of
temperature.
• Please operate the mobile phone according to the requests
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