Call divert
Select 
> Settings and Phone > Call divert .
Divert incoming calls to your voice mailbox or to another phone number. For details, contact your service provider.
Select the type of calls to divert and from the following:
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All voice calls or All fax calls — Divert all incoming voice or fax calls. You cannot answer the calls, only divert the calls to another number.
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If busy — Divert incoming calls if you have an active call.
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If not answered — Divert incoming calls after your device rings for a specified length of time. Select the length of time for the device to ring before diverting the call.
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If out of reach — Divert calls when the device is switched off or out of network coverage.
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If not available — Divert calls if you have an active call, do not answer, or the device is switched off or out of network coverage.
To divert calls to your voice mailbox, select a call type, a diverting option, and Options > Activate > To voice mailbox .
To divert calls to another phone number, select a call type, a diverting option, and Options > Activate > To other number . Enter the number, or select Find to retrieve a number saved in Contacts.
To check the current diverting status, scroll to the diverting option, and select Options > Check status .
To stop diverting calls, scroll to the diverting option, and select Options > Deactivate .