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Forwarding Calls on Android devices, helps you forward a call when Busy, Unanswered, Unreachable or even Always. To enable this setting on Samsung Galaxy S4 and other Samsung Galaxy devices, Sony Xperia Devices, HTC One and other Android phones, do as follows
** Note that, This instruction is based on Galaxy S4. On other devices, the path may vary a little
1.Go to Setting
2.Go to My Device tab
3.Open “Call” and go to “Additional Settings”
4.Tap on “Call forwarding”
5.Choose between Voice call or Video call
6.Choose when to forward the call and tap on the options (Always, busy, unanswered, unreachable)
7.Add the number you would like to forward the call to
Read More Galaxy S4 Tips and Tricks