Verykool i604 - Manual (Page 9)

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.
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