Verykool s4010 - Manual (Page 27)

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Press the buttons lightly.
Use the special features which are designed to minimize the times of
pressing buttons, such as Message Templates and Predictive Text.
Take lots of breaks to stretch and relax.
Emergency Calls
This phone, like any wireless phone, operates using radio signals,
which cannot guarantee connection in all conditions. Therefore, you must
never rely solely on any wireless phone for emergency communications.
Loud Noise
This phone is capable of producing loud noises, which may damage
your hearing. Turn down the volume before using headphones, Bluetooth
stereo headsets or other audio devices.
Phone Heating
Your phone may become warm during charging and during normal
use.
Electrical Safety
Accessories
Use only approved accessories.
Do not connect with incompatible products or accessories.
Take care not to touch or allow metal objects, such as coins or key
rings, to contact or short-circuit in the battery terminals.
Connection to a Car
Seek professional advice when connecting a phone interface to the