Nokia 3586i User Manual page 115

View Roaming options
The menu options you see in your phone are based on your service provider's
network. Their network determines which options actually appear in the
phone's menu. The following is a description of the options that may
appear in your phone:
Option
Home only You can make and receive calls in your home area only.
While roaming, No Service appears and you cannot make
or receive calls.
Automatic Your phone automatically selects the best available system.
Description
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