Go to Call button > Key Pad > touch three dots on top right hand side > Settings > Supplementary services > Call Forwarding.
1Launch the
Phone app
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2Tap on 
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3Select Settings
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4Scroll down to More settings
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5Select Call Forwarding
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6Select a Call Forwarding option
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7Type in the number you would like to call to be forwarded to, than tap on ENABLE
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