Verykool i600 - Manual (Page 5)

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GENERAL INFORMATION
Antenna
Use of other antenna devices could damage your mobile phone and reduce
performance. Your phone has a built-in antenna. Don’t touch the antenna
area unnecessarily when the phone is switched on. Contact with the
antenna affects call quality and may cause the phone to operate at a higher
power level than otherwise needed.
Network Service
To use the phone you must have service from a wireless service provider.
Many of the features in this device depend on features in the wireless
network to function. These network services may not be available on all
networks or you may have to make specific arrangements with your service
provider before you can utilize network services. Your service provider may
need to give you additional instructions for their use and explain what
changes will apply. Some network may have limitations that affect how you
can use network services.
Your service provider
may have requested that certain features may be
disabled or not activated in your device. If so, they will not appear in the
device menu. Your device may also has been specially configured, this
configuration may include changes. Contact your service provider for more
information. For availability and information using SIM card services, contact
your service provider.
Accessories
Li-Ion battery is the manufacturer-approved rechargeable battery available
for your phone. May be some batteries perform best after several full
charge/discharge cycles.
Use batteries, chargers and accessories approved by the phone
manufacturer with this particular model. The use of any other type will
invalidate any approval or warranty applying to the phone, and may be
dangerous.
Please consult with your dealer for availability of approved accessories.